18186901 has 2 divisors, whose sum is σ = 18186902. Its totient is φ = 18186900.

The previous prime is 18186881. The next prime is 18186919. The reversal of 18186901 is 10968181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9180900 + 9006001 = 3030^2 + 3001^2 .

It is a cyclic number.

It is not a de Polignac number, because 18186901 - 2¹³ = 18178709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18106901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9093450 + 9093451.

It is an arithmetic number, because the mean of its divisors is an integer number (9093451).

Almost surely, 2^18186901 is an apocalyptic number.

It is an amenable number.

18186901 is a deficient number, since it is larger than the sum of its proper divisors (1).

18186901 is an equidigital number, since it uses as much as digits as its factorization.

18186901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 18186901 is about 4264.6102987260. The cubic root of 18186901 is about 262.9780904802.

The spelling of 18186901 in words is "eighteen million, one hundred eighty-six thousand, nine hundred one".