20854808160 has 48 divisors (see below), whose sum is σ = 65692647216. Its totient is φ = 5561282048.

The previous prime is 20854808129. The next prime is 20854808189. The reversal of 20854808160 is 6180845802.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21723279 + ... + 21724238.

It is an arithmetic number, because the mean of its divisors is an integer number (1368596817).

Almost surely, 2^20854808160 is an apocalyptic number.

20854808160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20854808160 is an abundant number, since it is smaller than the sum of its proper divisors (44837839056).

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

20854808160 is a wasteful number, since it uses less digits than its factorization.

20854808160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43447535 (or 43447527 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 42.

The spelling of 20854808160 in words is "twenty billion, eight hundred fifty-four million, eight hundred eight thousand, one hundred sixty".