20515628160 has 160 divisors (see below), whose sum is σ = 73265197500. Its totient is φ = 5470820352.

The previous prime is 20515628143. The next prime is 20515628171. The reversal of 20515628160 is 6182651502.

20515628160 is a `hidden beast` number, since 2 + 0 + 5 + 15 + 628 + 16 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20508531264 + 7096896 = 143208^2 + 2664^2 .

It is a tau number, because it is divible by the number of its divisors (160).

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 146035 + ... + 249714.

Almost surely, 2^20515628160 is an apocalyptic number.

20515628160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20515628160 is an abundant number, since it is smaller than the sum of its proper divisors (52749569340).

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

20515628160 is an equidigital number, since it uses as much as digits as its factorization.

20515628160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395780 (or 395759 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 20515628160 in words is "twenty billion, five hundred fifteen million, six hundred twenty-eight thousand, one hundred sixty".