20735870080 has 64 divisors (see below), whose sum is σ = 50169067200. Its totient is φ = 8194395136.

The previous prime is 20735870069. The next prime is 20735870083. The reversal of 20735870080 is 8007853702.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (20735870083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142060 + ... + 248299.

It is an arithmetic number, because the mean of its divisors is an integer number (783891675).

Almost surely, 2^20735870080 is an apocalyptic number.

20735870080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20735870080 is an abundant number, since it is smaller than the sum of its proper divisors (29433197120).

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

20735870080 is an equidigital number, since it uses as much as digits as its factorization.

20735870080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390461 (or 390449 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 20735870080 in words is "twenty billion, seven hundred thirty-five million, eight hundred seventy thousand, eighty".