20915896092100 has 27 divisors (see below), whose sum is σ = 45387593762637. Its totient is φ = 8366340143280.

The previous prime is 20915896092097. The next prime is 20915896092103. The reversal of 20915896092100 is 129069851902.

The square root of 20915896092100 is 4573390.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (20915896092097) and next prime (20915896092103).

It can be written as a sum of positive squares in only one way, i.e., 7529722593156 + 13386173498944 = 2744034^2 + 3658712^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20915896092103) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 45505231 + ... + 45962569.

Almost surely, 2^{20915896092100} is an apocalyptic number.

20915896092100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

20915896092100 is the 4573390-th square number.

It is an amenable number.

20915896092100 is an abundant number, since it is smaller than the sum of its proper divisors (24471697670537).

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

20915896092100 is an frugal number, since it uses more digits than its factorization.

20915896092100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914692 (or 457346 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 52.

The spelling of 20915896092100 in words is "twenty trillion, nine hundred fifteen billion, eight hundred ninety-six million, ninety-two thousand, one hundred".