18450267769 has 2 divisors, whose sum is σ = 18450267770. Its totient is φ = 18450267768.

The previous prime is 18450267757. The next prime is 18450267839. The reversal of 18450267769 is 96776205481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15323221369 + 3127046400 = 123787^2 + 55920^2 .

It is a cyclic number.

It is not a de Polignac number, because 18450267769 - 2²⁷ = 18316050041 is a prime.

It is a super-2 number, since 2×18450267769² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18450217769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9225133884 + 9225133885.

It is an arithmetic number, because the mean of its divisors is an integer number (9225133885).

Almost surely, 2^18450267769 is an apocalyptic number.

It is an amenable number.

18450267769 is a deficient number, since it is larger than the sum of its proper divisors (1).

18450267769 is an equidigital number, since it uses as much as digits as its factorization.

18450267769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 18450267769 in words is "eighteen billion, four hundred fifty million, two hundred sixty-seven thousand, seven hundred sixty-nine".