18468791 has 16 divisors (see below), whose sum is σ = 20805120. Its totient is φ = 16250880.

The previous prime is 18468767. The next prime is 18468811. The reversal of 18468791 is 19786481.

It is a cyclic number.

It is not a de Polignac number, because 18468791 - 2²² = 14274487 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 (18468091) 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, 71735 + ... + 71991.

It is an arithmetic number, because the mean of its divisors is an integer number (1300320).

Almost surely, 2^18468791 is an apocalyptic number.

18468791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18468791 is a deficient number, since it is larger than the sum of its proper divisors (2336329).

18468791 is a wasteful number, since it uses less digits than its factorization.

18468791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454.

The product of its digits is 96768, while the sum is 44.

The square root of 18468791 is about 4297.5331295989. The cubic root of 18468791 is about 264.3298171625.

The spelling of 18468791 in words is "eighteen million, four hundred sixty-eight thousand, seven hundred ninety-one".