21326057574 has 16 divisors (see below), whose sum is σ = 42657846960. Its totient is φ = 7107730560.

The previous prime is 21326057573. The next prime is 21326057579. The reversal of 21326057574 is 47575062312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21326057573) 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, 189679 + ... + 280410.

It is an arithmetic number, because the mean of its divisors is an integer number (2666115435).

Almost surely, 2^21326057574 is an apocalyptic number.

21326057574 is an abundant number, since it is smaller than the sum of its proper divisors (21331789386).

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

21326057574 is a wasteful number, since it uses less digits than its factorization.

21326057574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477655.

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 21326057574 in words is "twenty-one billion, three hundred twenty-six million, fifty-seven thousand, five hundred seventy-four".