18971934 has 16 divisors (see below), whose sum is σ = 38003088. Its totient is φ = 6314112.

The previous prime is 18971923. The next prime is 18971947. The reversal of 18971934 is 43917981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2454 + ... + 6630.

It is an arithmetic number, because the mean of its divisors is an integer number (2375193).

Almost surely, 2^18971934 is an apocalyptic number.

18971934 is an abundant number, since it is smaller than the sum of its proper divisors (19031154).

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

18971934 is a wasteful number, since it uses less digits than its factorization.

18971934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4939.

The product of its digits is 54432, while the sum is 42.

The square root of 18971934 is about 4355.6783627812. The cubic root of 18971934 is about 266.7087117732.

The spelling of 18971934 in words is "eighteen million, nine hundred seventy-one thousand, nine hundred thirty-four".