18974398 has 8 divisors (see below), whose sum is σ = 28570608. Its totient is φ = 9450864.

The previous prime is 18974383. The next prime is 18974399. The reversal of 18974398 is 89347981.

It is a happy number.

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 (18974399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17511 + ... + 18562.

It is an arithmetic number, because the mean of its divisors is an integer number (3571326).

Almost surely, 2^18974398 is an apocalyptic number.

18974398 is a deficient number, since it is larger than the sum of its proper divisors (9596210).

18974398 is a wasteful number, since it uses less digits than its factorization.

18974398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36338.

The product of its digits is 435456, while the sum is 49.

The square root of 18974398 is about 4355.9612027657. The cubic root of 18974398 is about 266.7202576321.

The spelling of 18974398 in words is "eighteen million, nine hundred seventy-four thousand, three hundred ninety-eight".