18719140734 has 24 divisors (see below), whose sum is σ = 46352158320. Its totient is φ = 5348325888.

The previous prime is 18719140667. The next prime is 18719140747. The reversal of 18719140734 is 43704191781.

It is a self number, because there is not a number n which added to its sum of digits gives 18719140734.

It is a congruent number.

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, 74282179 + ... + 74282430.

It is an arithmetic number, because the mean of its divisors is an integer number (1931339930).

Almost surely, 2^18719140734 is an apocalyptic number.

18719140734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18719140734 is an abundant number, since it is smaller than the sum of its proper divisors (27633017586).

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

18719140734 is a wasteful number, since it uses less digits than its factorization.

18719140734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148564624 (or 148564621 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 18719140734 in words is "eighteen billion, seven hundred nineteen million, one hundred forty thousand, seven hundred thirty-four".