18348491 has 12 divisors (see below), whose sum is σ = 22600728. Its totient is φ = 14801472.

The previous prime is 18348481. The next prime is 18348493. The reversal of 18348491 is 19484381.

It is not a de Polignac number, because 18348491 - 2⁶ = 18348427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18348493) 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, 10181 + ... + 11846.

It is an arithmetic number, because the mean of its divisors is an integer number (1883394).

Almost surely, 2^18348491 is an apocalyptic number.

18348491 is a deficient number, since it is larger than the sum of its proper divisors (4252237).

18348491 is a wasteful number, since it uses less digits than its factorization.

18348491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22058 (or 22051 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 18348491 is about 4283.5138613059. The cubic root of 18348491 is about 263.7546455910.

The spelling of 18348491 in words is "eighteen million, three hundred forty-eight thousand, four hundred ninety-one".