20187278304 has 24 divisors (see below), whose sum is σ = 52991605800. Its totient is φ = 6729092736.

The previous prime is 20187278299. The next prime is 20187278317. The reversal of 20187278304 is 40387278102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105141979 + ... + 105142170.

It is an arithmetic number, because the mean of its divisors is an integer number (2207983575).

Almost surely, 2^20187278304 is an apocalyptic number.

20187278304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20187278304 is an abundant number, since it is smaller than the sum of its proper divisors (32804327496).

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

20187278304 is a wasteful number, since it uses less digits than its factorization.

20187278304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210284162 (or 210284154 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 20187278304 in words is "twenty billion, one hundred eighty-seven million, two hundred seventy-eight thousand, three hundred four".