21380553296032 has 48 divisors (see below), whose sum is σ = 49088005041600. Its totient is φ = 9163094265024.

The previous prime is 21380553295991. The next prime is 21380553296051. The reversal of 21380553296032 is 23069235508312.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973957378 + ... + 973979329.

It is an arithmetic number, because the mean of its divisors is an integer number (1022666771700).

Almost surely, 2^{21380553296032} is an apocalyptic number.

It is an amenable number.

21380553296032 is an abundant number, since it is smaller than the sum of its proper divisors (27707451745568).

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

21380553296032 is an equidigital number, since it uses as much as digits as its factorization.

21380553296032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947936738 (or 1947936716 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 21380553296032 in words is "twenty-one trillion, three hundred eighty billion, five hundred fifty-three million, two hundred ninety-six thousand, thirty-two".