21045256152 has 32 divisors (see below), whose sum is σ = 54427388400. Its totient is φ = 6773185664.

The previous prime is 21045256147. The next prime is 21045256187. The reversal of 21045256152 is 25165254012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15118023 + ... + 15119414.

Almost surely, 2^21045256152 is an apocalyptic number.

It is an amenable number.

21045256152 is an abundant number, since it is smaller than the sum of its proper divisors (33382132248).

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

21045256152 is a wasteful number, since it uses less digits than its factorization.

21045256152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30237475 (or 30237471 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 21045256152 in words is "twenty-one billion, forty-five million, two hundred fifty-six thousand, one hundred fifty-two".