18972965 has 8 divisors (see below), whose sum is σ = 24837408. Its totient is φ = 13798480.

The previous prime is 18972937. The next prime is 18972973. The reversal of 18972965 is 56927981.

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

It is not a de Polignac number, because 18972965 - 2¹⁸ = 18710821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172427 + ... + 172536.

It is an arithmetic number, because the mean of its divisors is an integer number (3104676).

Almost surely, 2^18972965 is an apocalyptic number.

It is an amenable number.

18972965 is a deficient number, since it is larger than the sum of its proper divisors (5864443).

18972965 is a wasteful number, since it uses less digits than its factorization.

18972965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344979.

The product of its digits is 272160, while the sum is 47.

The square root of 18972965 is about 4355.7967124282. The cubic root of 18972965 is about 266.7135429746.

The spelling of 18972965 in words is "eighteen million, nine hundred seventy-two thousand, nine hundred sixty-five".