21232031937464 has 64 divisors (see below), whose sum is σ = 42157807352640. Its totient is φ = 10003974266880.

The previous prime is 21232031937463. The next prime is 21232031937491. The reversal of 21232031937464 is 46473913023212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232031937463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10936484 + ... + 12730700.

It is an arithmetic number, because the mean of its divisors is an integer number (658715739885).

Almost surely, 2^{21232031937464} is an apocalyptic number.

It is an amenable number.

21232031937464 is a deficient number, since it is larger than the sum of its proper divisors (20925775415176).

21232031937464 is a wasteful number, since it uses less digits than its factorization.

21232031937464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795200 (or 1795196 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 47.

The spelling of 21232031937464 in words is "twenty-one trillion, two hundred thirty-two billion, thirty-one million, nine hundred thirty-seven thousand, four hundred sixty-four".