21437568326336 has 28 divisors (see below), whose sum is σ = 43078657881120. Its totient is φ = 10583103348480.

The previous prime is 21437568326329. The next prime is 21437568326341. The reversal of 21437568326336 is 63362386573412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2120007635 + ... + 2120017746.

Almost surely, 2^{21437568326336} is an apocalyptic number.

It is an amenable number.

21437568326336 is an abundant number, since it is smaller than the sum of its proper divisors (21641089554784).

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

21437568326336 is an equidigital number, since it uses as much as digits as its factorization.

21437568326336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240025472 (or 4240025462 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 59.

The spelling of 21437568326336 in words is "twenty-one trillion, four hundred thirty-seven billion, five hundred sixty-eight million, three hundred twenty-six thousand, three hundred thirty-six".