21423424684524 has 24 divisors (see below), whose sum is σ = 49990377920448. Its totient is φ = 7140800562960.

The previous prime is 21423424684511. The next prime is 21423424684567. The reversal of 21423424684524 is 42548642432412.

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, 42362982 + ... + 42865709.

It is an arithmetic number, because the mean of its divisors is an integer number (2082932413352).

Almost surely, 2^{21423424684524} is an apocalyptic number.

It is an amenable number.

21423424684524 is an abundant number, since it is smaller than the sum of its proper divisors (28566953235924).

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

21423424684524 is a wasteful number, since it uses less digits than its factorization.

21423424684524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85249645 (or 85249643 counting only the distinct ones).

The product of its digits is 11796480, while the sum is 51.

The spelling of 21423424684524 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-four million, six hundred eighty-four thousand, five hundred twenty-four".