18449001 has 12 divisors (see below), whose sum is σ = 26685828. Its totient is φ = 12282144.

The previous prime is 18448973. The next prime is 18449003. The reversal of 18449001 is 10094481.

It can be written as a sum of positive squares in 2 ways, for example, as 17438976 + 1010025 = 4176^2 + 1005^2 .

It is not a de Polignac number, because 18449001 - 2⁷ = 18448873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18449003) 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, 11611 + ... + 13103.

It is an arithmetic number, because the mean of its divisors is an integer number (2223819).

Almost surely, 2^18449001 is an apocalyptic number.

It is an amenable number.

18449001 is a deficient number, since it is larger than the sum of its proper divisors (8236827).

18449001 is a wasteful number, since it uses less digits than its factorization.

18449001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872 (or 2869 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18449001 is about 4295.2300287645. The cubic root of 18449001 is about 264.2353703264.

The spelling of 18449001 in words is "eighteen million, four hundred forty-nine thousand, one".