18149091 has 16 divisors (see below), whose sum is σ = 24756480. Its totient is φ = 11823840.

The previous prime is 18149071. The next prime is 18149111. The reversal of 18149091 is 19094181.

It is an interprime number because it is at equal distance from previous prime (18149071) and next prime (18149111).

It is not a de Polignac number, because 18149091 - 2⁹ = 18148579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18149071) 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, 29301 + ... + 29913.

It is an arithmetic number, because the mean of its divisors is an integer number (1547280).

Almost surely, 2^18149091 is an apocalyptic number.

18149091 is a deficient number, since it is larger than the sum of its proper divisors (6607389).

18149091 is a wasteful number, since it uses less digits than its factorization.

18149091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 18149091 is about 4260.1749964057. The cubic root of 18149091 is about 262.7957229600.

The spelling of 18149091 in words is "eighteen million, one hundred forty-nine thousand, ninety-one".