18846477440 has 256 divisors, whose sum is σ = 54965433600. Its totient is φ = 6031933440.

The previous prime is 18846477409. The next prime is 18846477451. The reversal of 18846477440 is 4477464881.

It is a hoax number, since the sum of its digits (53) 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 31 ways as a sum of consecutive naturals, for example, 9976016 + ... + 9977904.

It is an arithmetic number, because the mean of its divisors is an integer number (214708725).

Almost surely, 2^18846477440 is an apocalyptic number.

18846477440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18846477440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27482716800).

18846477440 is an abundant number, since it is smaller than the sum of its proper divisors (36118956160).

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

18846477440 is a wasteful number, since it uses less digits than its factorization.

18846477440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063 (or 2051 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 53.

The spelling of 18846477440 in words is "eighteen billion, eight hundred forty-six million, four hundred seventy-seven thousand, four hundred forty".