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21201303030 = 2353719100273
BaseRepresentation
bin10011101111101100…
…100011010111110110
32000201112222210012120
4103233230203113312
5321410013144110
613423441300410
71350250050045
oct235754432766
960645883176
1021201303030
118a9a645846
124138334706
131ccb53722b
141051a7455c
15841462870
hex4efb235f6

21201303030 has 32 divisors (see below), whose sum is σ = 52258349664. Its totient is φ = 5500878336.

The previous prime is 21201303029. The next prime is 21201303043. The reversal of 21201303030 is 3030310212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9549027 + ... + 9551246.

It is an arithmetic number, because the mean of its divisors is an integer number (1633073427).

Almost surely, 221201303030 is an apocalyptic number.

21201303030 is an abundant number, since it is smaller than the sum of its proper divisors (31057046634).

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

21201303030 is a wasteful number, since it uses less digits than its factorization.

21201303030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19100320.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21201303030 its reverse (3030310212), we get a palindrome (24231613242).

The spelling of 21201303030 in words is "twenty-one billion, two hundred one million, three hundred three thousand, thirty".

Divisors: 1 2 3 5 6 10 15 30 37 74 111 185 222 370 555 1110 19100273 38200546 57300819 95501365 114601638 191002730 286504095 573008190 706710101 1413420202 2120130303 3533550505 4240260606 7067101010 10600651515 21201303030