21326057572 has 24 divisors (see below), whose sum is σ = 37480568832. Its totient is φ = 10617422400.

The previous prime is 21326057569. The next prime is 21326057573. The reversal of 21326057572 is 27575062312.

It is not an unprimeable number, because it can be changed into a prime (21326057573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 886333 + ... + 910075.

It is an arithmetic number, because the mean of its divisors is an integer number (1561690368).

Almost surely, 2^21326057572 is an apocalyptic number.

It is an amenable number.

21326057572 is a deficient number, since it is larger than the sum of its proper divisors (16154511260).

21326057572 is a wasteful number, since it uses less digits than its factorization.

21326057572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24699 (or 24697 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 21326057572 in words is "twenty-one billion, three hundred twenty-six million, fifty-seven thousand, five hundred seventy-two".