21552595458 has 32 divisors (see below), whose sum is σ = 43293229056. Its totient is φ = 7152911568.

The previous prime is 21552595439. The next prime is 21552595543. The reversal of 21552595458 is 85459525512.

It is a self number, because there is not a number n which added to its sum of digits gives 21552595458.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1804735 + ... + 1816637.

It is an arithmetic number, because the mean of its divisors is an integer number (1352913408).

Almost surely, 2^21552595458 is an apocalyptic number.

21552595458 is an abundant number, since it is smaller than the sum of its proper divisors (21740633598).

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

21552595458 is a wasteful number, since it uses less digits than its factorization.

21552595458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13198.

The product of its digits is 3600000, while the sum is 51.

The spelling of 21552595458 in words is "twenty-one billion, five hundred fifty-two million, five hundred ninety-five thousand, four hundred fifty-eight".