18919240174 has 8 divisors (see below), whose sum is σ = 28384301088. Its totient is φ = 9457806480.

The previous prime is 18919240169. The next prime is 18919240183. The reversal of 18919240174 is 47104291981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18919240174² (a number of 21 digits) contains 22 as substring.

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, 893727 + ... + 914650.

It is an arithmetic number, because the mean of its divisors is an integer number (3548037636).

Almost surely, 2^18919240174 is an apocalyptic number.

18919240174 is a deficient number, since it is larger than the sum of its proper divisors (9465060914).

18919240174 is a wasteful number, since it uses less digits than its factorization.

18919240174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813610.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 18919240174 in words is "eighteen billion, nine hundred nineteen million, two hundred forty thousand, one hundred seventy-four".