18957974 has 16 divisors (see below), whose sum is σ = 32817408. Its totient is φ = 8045352.

The previous prime is 18957973. The next prime is 18957989. The reversal of 18957974 is 47975981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18957973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5132 + ... + 8015.

It is an arithmetic number, because the mean of its divisors is an integer number (2051088).

Almost surely, 2^18957974 is an apocalyptic number.

18957974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18957974 is a deficient number, since it is larger than the sum of its proper divisors (13859434).

18957974 is a wasteful number, since it uses less digits than its factorization.

18957974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13259.

The product of its digits is 635040, while the sum is 50.

The square root of 18957974 is about 4354.0755620453. The cubic root of 18957974 is about 266.6432788516.

The spelling of 18957974 in words is "eighteen million, nine hundred fifty-seven thousand, nine hundred seventy-four".