18372452769 has 24 divisors (see below), whose sum is σ = 28994565600. Its totient is φ = 11117883840.

The previous prime is 18372452731. The next prime is 18372452801. The reversal of 18372452769 is 96725427381.

It is a happy number.

18372452769 is a `hidden beast` number, since 1 + 8 + 37 + 24 + 527 + 69 = 666.

It is not a de Polignac number, because 18372452769 - 2⁹ = 18372452257 is a prime.

It is a super-2 number, since 2×18372452769² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18372450769) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75564 + ... + 206045.

It is an arithmetic number, because the mean of its divisors is an integer number (1208106900).

Almost surely, 2^18372452769 is an apocalyptic number.

It is an amenable number.

18372452769 is a deficient number, since it is larger than the sum of its proper divisors (10622112831).

18372452769 is a wasteful number, since it uses less digits than its factorization.

18372452769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282285 (or 282282 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 18372452769 in words is "eighteen billion, three hundred seventy-two million, four hundred fifty-two thousand, seven hundred sixty-nine".