18274775989 has 2 divisors, whose sum is σ = 18274775990. Its totient is φ = 18274775988.

The previous prime is 18274775977. The next prime is 18274776001. The reversal of 18274775989 is 98957747281.

It is a balanced prime because it is at equal distance from previous prime (18274775977) and next prime (18274776001).

It can be written as a sum of positive squares in only one way, i.e., 16721076100 + 1553699889 = 129310^2 + 39417^2 .

It is a cyclic number.

It is not a de Polignac number, because 18274775989 - 2⁷ = 18274775861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18274775969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9137387994 + 9137387995.

It is an arithmetic number, because the mean of its divisors is an integer number (9137387995).

Almost surely, 2^18274775989 is an apocalyptic number.

It is an amenable number.

18274775989 is a deficient number, since it is larger than the sum of its proper divisors (1).

18274775989 is an equidigital number, since it uses as much as digits as its factorization.

18274775989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71124480, while the sum is 67.

The spelling of 18274775989 in words is "eighteen billion, two hundred seventy-four million, seven hundred seventy-five thousand, nine hundred eighty-nine".