18449901 has 12 divisors (see below), whose sum is σ = 26688480. Its totient is φ = 12282120.

The previous prime is 18449891. The next prime is 18449911. The reversal of 18449901 is 10994481.

It is an interprime number because it is at equal distance from previous prime (18449891) and next prime (18449911).

It is not a de Polignac number, because 18449901 - 2²² = 14255597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18449911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8880 + ... + 10758.

It is an arithmetic number, because the mean of its divisors is an integer number (2224040).

Almost surely, 2^18449901 is an apocalyptic number.

It is an amenable number.

18449901 is a deficient number, since it is larger than the sum of its proper divisors (8238579).

18449901 is a wasteful number, since it uses less digits than its factorization.

18449901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18449901 is about 4295.3347948676. The cubic root of 18449901 is about 264.2396669993.

The spelling of 18449901 in words is "eighteen million, four hundred forty-nine thousand, nine hundred one".