18490901 has 16 divisors (see below), whose sum is σ = 21869568. Its totient is φ = 15412800.

The previous prime is 18490891. The next prime is 18490909. The reversal of 18490901 is 10909481.

It is a de Polignac number, because none of the positive numbers 2^k-18490901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18490909) 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, 26975 + ... + 27651.

It is an arithmetic number, because the mean of its divisors is an integer number (1366848).

Almost surely, 2^18490901 is an apocalyptic number.

18490901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18490901 is the 2483-rd octagonal number.

It is an amenable number.

18490901 is a deficient number, since it is larger than the sum of its proper divisors (3378667).

18490901 is a wasteful number, since it uses less digits than its factorization.

18490901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 18490901 is about 4300.1047661656. The cubic root of 18490901 is about 264.4352563259.

It can be divided in two parts, 18490 and 901, that added together give a palindrome (19391).

The spelling of 18490901 in words is "eighteen million, four hundred ninety thousand, nine hundred one".