18973974 has 16 divisors (see below), whose sum is σ = 37995120. Its totient is φ = 6316800.

The previous prime is 18973949. The next prime is 18973979. The reversal of 18973974 is 47937981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18973979) 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, 5374 + ... + 8174.

It is an arithmetic number, because the mean of its divisors is an integer number (2374695).

Almost surely, 2^18973974 is an apocalyptic number.

18973974 is an abundant number, since it is smaller than the sum of its proper divisors (19021146).

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

18973974 is a wasteful number, since it uses less digits than its factorization.

18973974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935.

The product of its digits is 381024, while the sum is 48.

The square root of 18973974 is about 4355.9125335571. The cubic root of 18973974 is about 266.7182709159.

The spelling of 18973974 in words is "eighteen million, nine hundred seventy-three thousand, nine hundred seventy-four".