18972958 has 8 divisors (see below), whose sum is σ = 28483200. Its totient is φ = 9478560.

The previous prime is 18972937. The next prime is 18972973. The reversal of 18972958 is 85927981.

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

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, 283 + ... + 6166.

It is an arithmetic number, because the mean of its divisors is an integer number (3560400).

Almost surely, 2^18972958 is an apocalyptic number.

18972958 is a deficient number, since it is larger than the sum of its proper divisors (9510242).

18972958 is a wasteful number, since it uses less digits than its factorization.

18972958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7922.

The product of its digits is 362880, while the sum is 49.

The square root of 18972958 is about 4355.7959089012. The cubic root of 18972958 is about 266.7135101736.

The spelling of 18972958 in words is "eighteen million, nine hundred seventy-two thousand, nine hundred fifty-eight".