18336161 has 4 divisors (see below), whose sum is σ = 18358272. Its totient is φ = 18314052.

The previous prime is 18336107. The next prime is 18336167. The reversal of 18336161 is 16163381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16163381 = 13 ⋅1243337.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18336161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18336167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9761 + ... + 11486.

It is an arithmetic number, because the mean of its divisors is an integer number (4589568).

Almost surely, 2^18336161 is an apocalyptic number.

It is an amenable number.

18336161 is a deficient number, since it is larger than the sum of its proper divisors (22111).

18336161 is an equidigital number, since it uses as much as digits as its factorization.

18336161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22110.

The product of its digits is 2592, while the sum is 29.

The square root of 18336161 is about 4282.0743804843. The cubic root of 18336161 is about 263.6955522027.

The spelling of 18336161 in words is "eighteen million, three hundred thirty-six thousand, one hundred sixty-one".