18918107 has 16 divisors (see below), whose sum is σ = 20956320. Its totient is φ = 16972032.

The previous prime is 18918101. The next prime is 18918139. The reversal of 18918107 is 70181981.

It is a cyclic number.

It is not a de Polignac number, because 18918107 - 2⁶ = 18918043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18918101) 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, 95933 + ... + 96129.

It is an arithmetic number, because the mean of its divisors is an integer number (1309770).

Almost surely, 2^18918107 is an apocalyptic number.

18918107 is a deficient number, since it is larger than the sum of its proper divisors (2038213).

18918107 is a wasteful number, since it uses less digits than its factorization.

18918107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 18918107 is about 4349.4950281613. The cubic root of 18918107 is about 266.4562383336.

The spelling of 18918107 in words is "eighteen million, nine hundred eighteen thousand, one hundred seven".