18117077 has 16 divisors (see below), whose sum is σ = 20856960. Its totient is φ = 15576000.

The previous prime is 18117041. The next prime is 18117101. The reversal of 18117077 is 77071181.

It is not a de Polignac number, because 18117077 - 2⁸ = 18116821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18117277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25199 + ... + 25907.

It is an arithmetic number, because the mean of its divisors is an integer number (1303560).

Almost surely, 2^18117077 is an apocalyptic number.

It is an amenable number.

18117077 is a deficient number, since it is larger than the sum of its proper divisors (2739883).

18117077 is a wasteful number, since it uses less digits than its factorization.

18117077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 2744, while the sum is 32.

The square root of 18117077 is about 4256.4159806109. The cubic root of 18117077 is about 262.6411129412.

It can be divided in two parts, 1811 and 7077, that added together give a palindrome (8888).

The spelling of 18117077 in words is "eighteen million, one hundred seventeen thousand, seventy-seven".