21652556046020 has 48 divisors (see below), whose sum is σ = 46702721944368. Its totient is φ = 8426322616320.

The previous prime is 21652556045941. The next prime is 21652556046083. The reversal of 21652556046020 is 2064065525612.

It can be written as a sum of positive squares in 8 ways, for example, as 603380954176 + 21049175091844 = 776776^2 + 4587938^2 .

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, 9087284 + ... + 11219796.

It is an arithmetic number, because the mean of its divisors is an integer number (972973373841).

Almost surely, 2^{21652556046020} is an apocalyptic number.

21652556046020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21652556046020 is an abundant number, since it is smaller than the sum of its proper divisors (25050165898348).

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

21652556046020 is a wasteful number, since it uses less digits than its factorization.

21652556046020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146280 (or 2146278 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 21652556046020 in words is "twenty-one trillion, six hundred fifty-two billion, five hundred fifty-six million, forty-six thousand, twenty".