18874251816 has 32 divisors (see below), whose sum is σ = 53926434240. Its totient is φ = 5392643328.

The previous prime is 18874251797. The next prime is 18874251821. The reversal of 18874251816 is 61815247881.

It is a super-2 number, since 2×18874251816² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56173201 + ... + 56173536.

It is an arithmetic number, because the mean of its divisors is an integer number (1685201070).

Almost surely, 2^18874251816 is an apocalyptic number.

It is an amenable number.

18874251816 is an abundant number, since it is smaller than the sum of its proper divisors (35052182424).

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

18874251816 is a wasteful number, since it uses less digits than its factorization.

18874251816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112346753 (or 112346749 counting only the distinct ones).

The product of its digits is 860160, while the sum is 51.

The spelling of 18874251816 in words is "eighteen billion, eight hundred seventy-four million, two hundred fifty-one thousand, eight hundred sixteen".