18878276400 has 60 divisors (see below), whose sum is σ = 60473415912. Its totient is φ = 5034206720.

The previous prime is 18878276383. The next prime is 18878276441. The reversal of 18878276400 is 467287881.

It is a tau number, because it is divible by the number of its divisors (60).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7864749 + ... + 7867148.

Almost surely, 2^18878276400 is an apocalyptic number.

18878276400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18878276400 is an abundant number, since it is smaller than the sum of its proper divisors (41595139512).

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

18878276400 is a wasteful number, since it uses less digits than its factorization.

18878276400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15731918 (or 15731907 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 51.

The spelling of 18878276400 in words is "eighteen billion, eight hundred seventy-eight million, two hundred seventy-six thousand, four hundred".