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20125505 = 54393607
BaseRepresentation
bin100110011000…
…1011101000001
31101212111000002
41030301131001
520123004010
61555205345
7333030641
oct114613501
941774002
1020125505
11103a6654
1268a6855
1342285aa
14295c521
151b781a5
hex1331741

20125505 has 8 divisors (see below), whose sum is σ = 24712512. Its totient is φ = 15725808.

The previous prime is 20125471. The next prime is 20125513. The reversal of 20125505 is 50552102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20125505 - 28 = 20125249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46589 + ... + 47018.

It is an arithmetic number, because the mean of its divisors is an integer number (3089064).

Almost surely, 220125505 is an apocalyptic number.

It is an amenable number.

20125505 is a deficient number, since it is larger than the sum of its proper divisors (4587007).

20125505 is an equidigital number, since it uses as much as digits as its factorization.

20125505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93655.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 20125505 is about 4486.1458959780. The cubic root of 20125505 is about 272.0083664165.

Adding to 20125505 its reverse (50552102), we get a palindrome (70677607).

The spelling of 20125505 in words is "twenty million, one hundred twenty-five thousand, five hundred five".

Divisors: 1 5 43 215 93607 468035 4025101 20125505