18814501 has 2 divisors, whose sum is σ = 18814502. Its totient is φ = 18814500.

The previous prime is 18814487. The next prime is 18814513. The reversal of 18814501 is 10541881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15610401 + 3204100 = 3951^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 18814501 - 2⁵ = 18814469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18814501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18814571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9407250 + 9407251.

It is an arithmetic number, because the mean of its divisors is an integer number (9407251).

Almost surely, 2^18814501 is an apocalyptic number.

It is an amenable number.

18814501 is a deficient number, since it is larger than the sum of its proper divisors (1).

18814501 is an equidigital number, since it uses as much as digits as its factorization.

18814501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 18814501 is about 4337.5685585360. The cubic root of 18814501 is about 265.9689271560.

The spelling of 18814501 in words is "eighteen million, eight hundred fourteen thousand, five hundred one".