20553236128 has 24 divisors (see below), whose sum is σ = 40467428820. Its totient is φ = 10275793920.

The previous prime is 20553236107. The next prime is 20553236141. The reversal of 20553236128 is 82163235502.

It can be written as a sum of positive squares in 2 ways, for example, as 20228803984 + 324432144 = 142228^2 + 18012^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662238 + ... + 692578.

Almost surely, 2^20553236128 is an apocalyptic number.

It is an amenable number.

20553236128 is a deficient number, since it is larger than the sum of its proper divisors (19914192692).

20553236128 is a wasteful number, since it uses less digits than its factorization.

20553236128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51520 (or 51512 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 20553236128 in words is "twenty billion, five hundred fifty-three million, two hundred thirty-six thousand, one hundred twenty-eight".