21376035566020 has 24 divisors (see below), whose sum is σ = 44926200106200. Its totient is φ = 8543457004032.

The previous prime is 21376035565999. The next prime is 21376035566069. The reversal of 21376035566020 is 2066553067312.

It can be written as a sum of positive squares in 4 ways, for example, as 2894135878656 + 18481899687364 = 1701216^2 + 4299058^2 .

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, 434801205 + ... + 434850364.

It is an arithmetic number, because the mean of its divisors is an integer number (1871925004425).

Almost surely, 2^{21376035566020} is an apocalyptic number.

21376035566020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21376035566020 is an abundant number, since it is smaller than the sum of its proper divisors (23550164540180).

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

21376035566020 is a wasteful number, since it uses less digits than its factorization.

21376035566020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869652807 (or 869652805 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 21376035566020 in words is "twenty-one trillion, three hundred seventy-six billion, thirty-five million, five hundred sixty-six thousand, twenty".