21312014024 has 32 divisors (see below), whose sum is σ = 45706771200. Its totient is φ = 9126086400.

The previous prime is 21312013907. The next prime is 21312014027. The reversal of 21312014024 is 42041021312.

It is a junction number, because it is equal to n+sod(n) for n = 21312013987 and 21312014005.

It is not an unprimeable number, because it can be changed into a prime (21312014027) by changing a digit.

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, 91184 + ... + 225695.

It is an arithmetic number, because the mean of its divisors is an integer number (1428336600).

Almost surely, 2^21312014024 is an apocalyptic number.

It is an amenable number.

21312014024 is an abundant number, since it is smaller than the sum of its proper divisors (24394757176).

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

21312014024 is a wasteful number, since it uses less digits than its factorization.

21312014024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318093 (or 318089 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21312014024 its reverse (42041021312), we get a palindrome (63353035336).

The spelling of 21312014024 in words is "twenty-one billion, three hundred twelve million, fourteen thousand, twenty-four".