21260202152 has 64 divisors (see below), whose sum is σ = 47977267200. Its totient is φ = 8628016320.

The previous prime is 21260202149. The next prime is 21260202179. The reversal of 21260202152 is 25120206212.

It is a super-2 number, since 2×21260202152² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3860633 + ... + 3866135.

It is an arithmetic number, because the mean of its divisors is an integer number (749644800).

Almost surely, 2^21260202152 is an apocalyptic number.

It is an amenable number.

21260202152 is an abundant number, since it is smaller than the sum of its proper divisors (26717065048).

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

21260202152 is a wasteful number, since it uses less digits than its factorization.

21260202152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9166 (or 9162 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21260202152 its reverse (25120206212), we get a palindrome (46380408364).

The spelling of 21260202152 in words is "twenty-one billion, two hundred sixty million, two hundred two thousand, one hundred fifty-two".