18339161 has 12 divisors (see below), whose sum is σ = 19892772. Its totient is φ = 16892064.

The previous prime is 18339157. The next prime is 18339169. The reversal of 18339161 is 16193381.

It can be written as a sum of positive squares in 2 ways, for example, as 17472400 + 866761 = 4180^2 + 931^2 .

It is not a de Polignac number, because 18339161 - 2² = 18339157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18339169) 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, 12671 + ... + 14043.

It is an arithmetic number, because the mean of its divisors is an integer number (1657731).

Almost surely, 2^18339161 is an apocalyptic number.

It is an amenable number.

18339161 is a deficient number, since it is larger than the sum of its proper divisors (1553611).

18339161 is a wasteful number, since it uses less digits than its factorization.

18339161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448 (or 1429 counting only the distinct ones).

The product of its digits is 3888, while the sum is 32.

The square root of 18339161 is about 4282.4246636689. The cubic root of 18339161 is about 263.7099325941.

The spelling of 18339161 in words is "eighteen million, three hundred thirty-nine thousand, one hundred sixty-one".