18419974 has 8 divisors (see below), whose sum is σ = 27940680. Its totient is φ = 9106416.

The previous prime is 18419963. The next prime is 18419981. The reversal of 18419974 is 47991481.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18419974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51564 + ... + 51919.

It is an arithmetic number, because the mean of its divisors is an integer number (3492585).

Almost surely, 2^18419974 is an apocalyptic number.

18419974 is a deficient number, since it is larger than the sum of its proper divisors (9520706).

18419974 is a wasteful number, since it uses less digits than its factorization.

18419974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103574.

The product of its digits is 72576, while the sum is 43.

The square root of 18419974 is about 4291.8497177790. The cubic root of 18419974 is about 264.0967180824.

The spelling of 18419974 in words is "eighteen million, four hundred nineteen thousand, nine hundred seventy-four".