18769901 has 2 divisors, whose sum is σ = 18769902. Its totient is φ = 18769900.

The previous prime is 18769871. The next prime is 18769903. The reversal of 18769901 is 10996781.

It is a happy number.

18769901 is nontrivially palindromic in base 7.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14364100 + 4405801 = 3790^2 + 2099^2 .

It is an emirp because it is prime and its reverse (10996781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18769901 - 2⁶ = 18769837 is a prime.

Together with 18769903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18769903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9384950 + 9384951.

It is an arithmetic number, because the mean of its divisors is an integer number (9384951).

Almost surely, 2^18769901 is an apocalyptic number.

It is an amenable number.

18769901 is a deficient number, since it is larger than the sum of its proper divisors (1).

18769901 is an equidigital number, since it uses as much as digits as its factorization.

18769901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 18769901 is about 4332.4243790284. The cubic root of 18769901 is about 265.7586000314.

The spelling of 18769901 in words is "eighteen million, seven hundred sixty-nine thousand, nine hundred one".