20368520352 has 72 divisors (see below), whose sum is σ = 61330228596. Its totient is φ = 6390122496.

The previous prime is 20368520329. The next prime is 20368520363. The reversal of 20368520352 is 25302586302.

20368520352 is a `hidden beast` number, since 20 + 3 + 68 + 520 + 3 + 52 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19253227536 + 1115292816 = 138756^2 + 33396^2 .

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

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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, 2075223 + ... + 2085014.

Almost surely, 2^20368520352 is an apocalyptic number.

It is an amenable number.

20368520352 is an abundant number, since it is smaller than the sum of its proper divisors (40961708244).

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

20368520352 is a wasteful number, since it uses less digits than its factorization.

20368520352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160270 (or 4160259 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 20368520352 in words is "twenty billion, three hundred sixty-eight million, five hundred twenty thousand, three hundred fifty-two".