21312442424032 has 24 divisors (see below), whose sum is σ = 41959402588656. Its totient is φ = 10656086211072.

The previous prime is 21312442424029. The next prime is 21312442424033. The reversal of 21312442424032 is 23042424421312.

It is a super-2 number, since 2×21312442424032² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312442424033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628953 + ... + 6728920.

It is an arithmetic number, because the mean of its divisors is an integer number (1748308441194).

Almost surely, 2^{21312442424032} is an apocalyptic number.

It is an amenable number.

21312442424032 is a deficient number, since it is larger than the sum of its proper divisors (20646960164624).

21312442424032 is an equidigital number, since it uses as much as digits as its factorization.

21312442424032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8437570 (or 8437562 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 21312442424032 its reverse (23042424421312), we get a palindrome (44354866845344).

The spelling of 21312442424032 in words is "twenty-one trillion, three hundred twelve billion, four hundred forty-two million, four hundred twenty-four thousand, thirty-two".