18100449 has 16 divisors (see below), whose sum is σ = 26928000. Its totient is φ = 12016368.

The previous prime is 18100429. The next prime is 18100487. The reversal of 18100449 is 94400181.

It is not a de Polignac number, because 18100449 - 2⁸ = 18100193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18100429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5827 + ... + 8375.

It is an arithmetic number, because the mean of its divisors is an integer number (1683000).

Almost surely, 2^18100449 is an apocalyptic number.

It is an amenable number.

18100449 is a deficient number, since it is larger than the sum of its proper divisors (8827551).

18100449 is a wasteful number, since it uses less digits than its factorization.

18100449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821 (or 2815 counting only the distinct ones).

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

The square root of 18100449 is about 4254.4622456898. The cubic root of 18100449 is about 262.5607369661.

The spelling of 18100449 in words is "eighteen million, one hundred thousand, four hundred forty-nine".