18413901 has 36 divisors (see below), whose sum is σ = 30091516. Its totient is φ = 10834560.

The previous prime is 18413897. The next prime is 18413903. The reversal of 18413901 is 10931481.

It can be written as a sum of positive squares in 2 ways, for example, as 16208676 + 2205225 = 4026^2 + 1485^2 .

It is not a de Polignac number, because 18413901 - 2² = 18413897 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18413903) 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 35 ways as a sum of consecutive naturals, for example, 40065 + ... + 40521.

Almost surely, 2^18413901 is an apocalyptic number.

18413901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18413901 is a deficient number, since it is larger than the sum of its proper divisors (11677615).

18413901 is a wasteful number, since it uses less digits than its factorization.

18413901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 18413901 is about 4291.1421556504. The cubic root of 18413901 is about 264.0676909755.

The spelling of 18413901 in words is "eighteen million, four hundred thirteen thousand, nine hundred one".