18814977 has 8 divisors (see below), whose sum is σ = 27874080. Its totient is φ = 12543300.

The previous prime is 18814973. The next prime is 18814979. The reversal of 18814977 is 77941881.

It is not a de Polignac number, because 18814977 - 2² = 18814973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18814973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348399 + ... + 348452.

It is an arithmetic number, because the mean of its divisors is an integer number (3484260).

Almost surely, 2^18814977 is an apocalyptic number.

It is an amenable number.

18814977 is a deficient number, since it is larger than the sum of its proper divisors (9059103).

18814977 is an equidigital number, since it uses as much as digits as its factorization.

18814977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696860 (or 696854 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 18814977 is about 4337.6234276387. The cubic root of 18814977 is about 265.9711701093.

It can be divided in two parts, 18814 and 977, that added together give a palindrome (19791).

The spelling of 18814977 in words is "eighteen million, eight hundred fourteen thousand, nine hundred seventy-seven".