20904533056 has 189 divisors, whose sum is σ = 48020420469. Its totient is φ = 9022041600.

The previous prime is 20904533029. The next prime is 20904533113. The reversal of 20904533056 is 65033540902.

The square root of 20904533056 is 144584.

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

It can be written as a sum of positive squares in only one way, i.e., 15070017600 + 5834515456 = 122760^2 + 76384^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 394425126 + ... + 394425178.

Almost surely, 2^20904533056 is an apocalyptic number.

20904533056 is the 144584-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20904533056

20904533056 is an abundant number, since it is smaller than the sum of its proper divisors (27115887413).

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

20904533056 is an equidigital number, since it uses as much as digits as its factorization.

20904533056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 20904533056 in words is "twenty billion, nine hundred four million, five hundred thirty-three thousand, fifty-six".