18310977 has 12 divisors (see below), whose sum is σ = 27361620. Its totient is φ = 11786208.

The previous prime is 18310973. The next prime is 18311011. The reversal of 18310977 is 77901381.

It can be written as a sum of positive squares in 2 ways, for example, as 5948721 + 12362256 = 2439^2 + 3516^2 .

It is not a de Polignac number, because 18310977 - 2² = 18310973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18310973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34818 + ... + 35339.

It is an arithmetic number, because the mean of its divisors is an integer number (2280135).

Almost surely, 2^18310977 is an apocalyptic number.

It is an amenable number.

18310977 is a deficient number, since it is larger than the sum of its proper divisors (9050643).

18310977 is a wasteful number, since it uses less digits than its factorization.

18310977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70192 (or 70189 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 18310977 is about 4279.1327392358. The cubic root of 18310977 is about 263.5747717141.

The spelling of 18310977 in words is "eighteen million, three hundred ten thousand, nine hundred seventy-seven".