21052839504 has 40 divisors (see below), whose sum is σ = 56751135552. Its totient is φ = 6712499200.

The previous prime is 21052839473. The next prime is 21052839529. The reversal of 21052839504 is 40593825012.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9533697 + ... + 9535904.

Almost surely, 2^21052839504 is an apocalyptic number.

21052839504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21052839504 is an abundant number, since it is smaller than the sum of its proper divisors (35698296048).

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

21052839504 is a wasteful number, since it uses less digits than its factorization.

21052839504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19069635 (or 19069629 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 21052839504 in words is "twenty-one billion, fifty-two million, eight hundred thirty-nine thousand, five hundred four".