20515053320 has 32 divisors (see below), whose sum is σ = 48165779520. Its totient is φ = 7849237440.

The previous prime is 20515053283. The next prime is 20515053341. The reversal of 20515053320 is 2335051502.

It is a self number, because there is not a number n which added to its sum of digits gives 20515053320.

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 7 ways as a sum of consecutive naturals, for example, 11148566 + ... + 11150405.

It is an arithmetic number, because the mean of its divisors is an integer number (1505180610).

Almost surely, 2^20515053320 is an apocalyptic number.

20515053320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20515053320 is an abundant number, since it is smaller than the sum of its proper divisors (27650726200).

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

20515053320 is a wasteful number, since it uses less digits than its factorization.

20515053320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22299005 (or 22299001 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The spelling of 20515053320 in words is "twenty billion, five hundred fifteen million, fifty-three thousand, three hundred twenty".