20533752072 has 40 divisors (see below), whose sum is σ = 57513520350. Its totient is φ = 6844583808.

The previous prime is 20533752053. The next prime is 20533752077. The reversal of 20533752072 is 27025733502.

20533752072 is a `hidden beast` number, since 2 + 0 + 533 + 7 + 52 + 0 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19095370596 + 1438381476 = 138186^2 + 37926^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20533752077) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15843297 + ... + 15844592.

Almost surely, 2^20533752072 is an apocalyptic number.

It is an amenable number.

20533752072 is an abundant number, since it is smaller than the sum of its proper divisors (36979768278).

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

20533752072 is a wasteful number, since it uses less digits than its factorization.

20533752072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31687907 (or 31687894 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 36.

The spelling of 20533752072 in words is "twenty billion, five hundred thirty-three million, seven hundred fifty-two thousand, seventy-two".