18477156672 has 448 divisors, whose sum is σ = 61129062400. Its totient is φ = 5466839040.

The previous prime is 18477156667. The next prime is 18477156679. The reversal of 18477156672 is 27665177481.

18477156672 is a `hidden beast` number, since 1 + 8 + 4 + 7 + 7 + 1 + 566 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18477156679) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 117688818 + ... + 117688974.

It is an arithmetic number, because the mean of its divisors is an integer number (136448800).

Almost surely, 2^18477156672 is an apocalyptic number.

18477156672 is a gapful number since it is divisible by the number (12) 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 18477156672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30564531200).

18477156672 is an abundant number, since it is smaller than the sum of its proper divisors (42651905728).

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

18477156672 is a wasteful number, since it uses less digits than its factorization.

18477156672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 206 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The spelling of 18477156672 in words is "eighteen billion, four hundred seventy-seven million, one hundred fifty-six thousand, six hundred seventy-two".