18772965 has 24 divisors (see below), whose sum is σ = 33747168. Its totient is φ = 10011600.

The previous prime is 18772937. The next prime is 18772979. The reversal of 18772965 is 56927781.

It is not a de Polignac number, because 18772965 - 2¹⁷ = 18641893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18772965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6511 + ... + 8940.

It is an arithmetic number, because the mean of its divisors is an integer number (1406132).

Almost surely, 2^18772965 is an apocalyptic number.

18772965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18772965 is a deficient number, since it is larger than the sum of its proper divisors (14974203).

18772965 is an equidigital number, since it uses as much as digits as its factorization.

18772965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15471 (or 15459 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 18772965 is about 4332.7779772335. Note that the first 3 decimals coincide. The cubic root of 18772965 is about 265.7730600623.

The spelling of 18772965 in words is "eighteen million, seven hundred seventy-two thousand, nine hundred sixty-five".