21532553104 has 20 divisors (see below), whose sum is σ = 41722094620. Its totient is φ = 10765560960.

The previous prime is 21532553059. The next prime is 21532553137. The reversal of 21532553104 is 40135523512.

It can be written as a sum of positive squares in 2 ways, for example, as 7319144704 + 14213408400 = 85552^2 + 119220^2 .

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, 271102 + ... + 341410.

It is an arithmetic number, because the mean of its divisors is an integer number (2086104731).

Almost surely, 2^21532553104 is an apocalyptic number.

It is an amenable number.

21532553104 is a deficient number, since it is larger than the sum of its proper divisors (20189541516).

21532553104 is a wasteful number, since it uses less digits than its factorization.

21532553104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89458 (or 89452 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 21532553104 in words is "twenty-one billion, five hundred thirty-two million, five hundred fifty-three thousand, one hundred four".