18160919 has 6 divisors (see below), whose sum is σ = 21126024. Its totient is φ = 15566460.

The previous prime is 18160907. The next prime is 18160949. The reversal of 18160919 is 91906181.

It is not a de Polignac number, because 18160919 - 2¹² = 18156823 is a prime.

It is a super-2 number, since 2×18160919² = 659637957849122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18160949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 185267 + ... + 185364.

It is an arithmetic number, because the mean of its divisors is an integer number (3521004).

Almost surely, 2^18160919 is an apocalyptic number.

18160919 is a deficient number, since it is larger than the sum of its proper divisors (2965105).

18160919 is an equidigital number, since it uses as much as digits as its factorization.

18160919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370645 (or 370638 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 18160919 is about 4261.5629761861. The cubic root of 18160919 is about 262.8527996993.

The spelling of 18160919 in words is "eighteen million, one hundred sixty thousand, nine hundred nineteen".