18912189734 has 8 divisors (see below), whose sum is σ = 28419216768. Its totient is φ = 9439117480.

The previous prime is 18912189727. The next prime is 18912189749. The reversal of 18912189734 is 43798121981.

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

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, 8487302 + ... + 8489529.

It is an arithmetic number, because the mean of its divisors is an integer number (3552402096).

Almost surely, 2^18912189734 is an apocalyptic number.

18912189734 is a deficient number, since it is larger than the sum of its proper divisors (9507027034).

18912189734 is a wasteful number, since it uses less digits than its factorization.

18912189734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16977390.

The product of its digits is 870912, while the sum is 53.

The spelling of 18912189734 in words is "eighteen billion, nine hundred twelve million, one hundred eighty-nine thousand, seven hundred thirty-four".