21331410251504 has 40 divisors (see below), whose sum is σ = 42452822117808. Its totient is φ = 10375927441920.

The previous prime is 21331410251407. The next prime is 21331410251551. The reversal of 21331410251504 is 40515201413312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431899 + ... + 6686789.

Almost surely, 2^{21331410251504} is an apocalyptic number.

It is an amenable number.

21331410251504 is a deficient number, since it is larger than the sum of its proper divisors (21121411866304).

21331410251504 is a wasteful number, since it uses less digits than its factorization.

21331410251504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261793 (or 5261787 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 21331410251504 its reverse (40515201413312), we get a palindrome (61846611664816).

The spelling of 21331410251504 in words is "twenty-one trillion, three hundred thirty-one billion, four hundred ten million, two hundred fifty-one thousand, five hundred four".