18766201 has 2 divisors, whose sum is σ = 18766202. Its totient is φ = 18766200.

The previous prime is 18766177. The next prime is 18766211. The reversal of 18766201 is 10266781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10791225 + 7974976 = 3285^2 + 2824^2 .

It is a cyclic number.

It is not a de Polignac number, because 18766201 - 2⁵ = 18766169 is a prime.

It is not a weakly prime, because it can be changed into another prime (18766211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9383100 + 9383101.

It is an arithmetic number, because the mean of its divisors is an integer number (9383101).

Almost surely, 2^18766201 is an apocalyptic number.

It is an amenable number.

18766201 is a deficient number, since it is larger than the sum of its proper divisors (1).

18766201 is an equidigital number, since it uses as much as digits as its factorization.

18766201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18766201 is about 4331.9973453362. The cubic root of 18766201 is about 265.7411364081.

It can be divided in two parts, 1876 and 6201, that multiplied together give a triangular number (11633076 = T₄₈₂₃).

The spelling of 18766201 in words is "eighteen million, seven hundred sixty-six thousand, two hundred one".