18971974 has 32 divisors (see below), whose sum is σ = 34110720. Its totient is φ = 7742112.

The previous prime is 18971959. The next prime is 18971993. The reversal of 18971974 is 47917981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33417 + ... + 33979.

It is an arithmetic number, because the mean of its divisors is an integer number (1065960).

Almost surely, 2^18971974 is an apocalyptic number.

18971974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18971974 is a deficient number, since it is larger than the sum of its proper divisors (15138746).

18971974 is a wasteful number, since it uses less digits than its factorization.

18971974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684.

The product of its digits is 127008, while the sum is 46.

The square root of 18971974 is about 4355.6829544860. The cubic root of 18971974 is about 266.7088992140.

The spelling of 18971974 in words is "eighteen million, nine hundred seventy-one thousand, nine hundred seventy-four".