21062651552 has 24 divisors (see below), whose sum is σ = 43649575200. Its totient is φ = 9977045184.

The previous prime is 21062651531. The next prime is 21062651587. The reversal of 21062651552 is 25515626012.

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, 17320652 + ... + 17321867.

It is an arithmetic number, because the mean of its divisors is an integer number (1818732300).

Almost surely, 2^21062651552 is an apocalyptic number.

It is an amenable number.

21062651552 is an abundant number, since it is smaller than the sum of its proper divisors (22586923648).

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

21062651552 is a wasteful number, since it uses less digits than its factorization.

21062651552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34642548 (or 34642540 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 21062651552 in words is "twenty-one billion, sixty-two million, six hundred fifty-one thousand, five hundred fifty-two".