18449031 has 12 divisors (see below), whose sum is σ = 24854312. Its totient is φ = 12172704.

The previous prime is 18449027. The next prime is 18449069. The reversal of 18449031 is 13094481.

It is a happy number.

It is not a de Polignac number, because 18449031 - 2² = 18449027 is a prime.

It is a super-2 number, since 2×18449031² = 680733489677922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18449031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18449531) 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, 66465 + ... + 66741.

Almost surely, 2^18449031 is an apocalyptic number.

18449031 is a deficient number, since it is larger than the sum of its proper divisors (6405281).

18449031 is an equidigital number, since it uses as much as digits as its factorization.

18449031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18449031 is about 4295.2335210091. The cubic root of 18449031 is about 264.2355135511.

The spelling of 18449031 in words is "eighteen million, four hundred forty-nine thousand, thirty-one".