20516552352 has 72 divisors (see below), whose sum is σ = 58554801396. Its totient is φ = 6814135296.

The previous prime is 20516552341. The next prime is 20516552363. The reversal of 20516552352 is 25325561502.

20516552352 is a `hidden beast` number, since 2 + 0 + 51 + 6 + 552 + 3 + 52 = 666.

It is an interprime number because it is at equal distance from previous prime (20516552341) and next prime (20516552363).

It can be written as a sum of positive squares in 2 ways, for example, as 18462287376 + 2054264976 = 135876^2 + 45324^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48813 + ... + 208364.

Almost surely, 2^20516552352 is an apocalyptic number.

It is an amenable number.

20516552352 is an abundant number, since it is smaller than the sum of its proper divisors (38038249044).

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

20516552352 is a wasteful number, since it uses less digits than its factorization.

20516552352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257470 (or 257459 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 20516552352 in words is "twenty billion, five hundred sixteen million, five hundred fifty-two thousand, three hundred fifty-two".