18497974 has 8 divisors (see below), whose sum is σ = 30269448. Its totient is φ = 8408160.

The previous prime is 18497939. The next prime is 18497977. The reversal of 18497974 is 47979481.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18497977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420387 + ... + 420430.

It is an arithmetic number, because the mean of its divisors is an integer number (3783681).

Almost surely, 2^18497974 is an apocalyptic number.

18497974 is a deficient number, since it is larger than the sum of its proper divisors (11771474).

18497974 is a wasteful number, since it uses less digits than its factorization.

18497974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840830.

The product of its digits is 508032, while the sum is 49.

The square root of 18497974 is about 4300.9271093568. The cubic root of 18497974 is about 264.4689686211.

The spelling of 18497974 in words is "eighteen million, four hundred ninety-seven thousand, nine hundred seventy-four".