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230220020 = 22511511001
BaseRepresentation
bin11011011100011…
…10000011110100
3121001012101111102
431232032003310
5432414020040
634502225232
75463560252
oct1556160364
9531171442
10230220020
11108a53788
1265125218
1338908484
142280b5d2
1515328515
hexdb8e0f4

230220020 has 12 divisors (see below), whose sum is σ = 483462084. Its totient is φ = 92088000.

The previous prime is 230220019. The next prime is 230220047. The reversal of 230220020 is 20022032.

It can be written as a sum of positive squares in 2 ways, for example, as 141181924 + 89038096 = 11882^2 + 9436^2 .

It is a junction number, because it is equal to n+sod(n) for n = 230219983 and 230220010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5755481 + ... + 5755520.

It is an arithmetic number, because the mean of its divisors is an integer number (40288507).

Almost surely, 2230220020 is an apocalyptic number.

230220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230220020 is an abundant number, since it is smaller than the sum of its proper divisors (253242064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

230220020 is a wasteful number, since it uses less digits than its factorization.

230220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11511010 (or 11511008 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 230220020 is about 15173.0029987475. The cubic root of 230220020 is about 612.8878742713.

Adding to 230220020 its reverse (20022032), we get a palindrome (250242052).

It can be divided in two parts, 2302 and 20020, that added together give a palindrome (22322).

The spelling of 230220020 in words is "two hundred thirty million, two hundred twenty thousand, twenty".

Divisors: 1 2 4 5 10 20 11511001 23022002 46044004 57555005 115110010 230220020