18475901 has 4 divisors (see below), whose sum is σ = 18517500. Its totient is φ = 18434304.

The previous prime is 18475867. The next prime is 18475903. The reversal of 18475901 is 10957481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10957481 = 769 ⋅14249.

It can be written as a sum of positive squares in 2 ways, for example, as 6120676 + 12355225 = 2474^2 + 3515^2 .

It is a cyclic number.

It is not a de Polignac number, because 18475901 - 2⁶ = 18475837 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 (18475903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20126 + ... + 21023.

It is an arithmetic number, because the mean of its divisors is an integer number (4629375).

Almost surely, 2^18475901 is an apocalyptic number.

It is an amenable number.

18475901 is a deficient number, since it is larger than the sum of its proper divisors (41599).

18475901 is an equidigital number, since it uses as much as digits as its factorization.

18475901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41598.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 18475901 is about 4298.3602687537. The cubic root of 18475901 is about 264.3637328256.

The spelling of 18475901 in words is "eighteen million, four hundred seventy-five thousand, nine hundred one".