18072769 has 16 divisors (see below), whose sum is σ = 21692160. Its totient is φ = 14837760.

The previous prime is 18072767. The next prime is 18072773. The reversal of 18072769 is 96727081.

It is a cyclic number.

It is not a de Polignac number, because 18072769 - 2¹ = 18072767 is a prime.

It is a super-2 number, since 2×18072769² = 653249958654722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18072763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5377 + ... + 8065.

It is an arithmetic number, because the mean of its divisors is an integer number (1355760).

Almost surely, 2^18072769 is an apocalyptic number.

18072769 is the 2689-th heptagonal number.

It is an amenable number.

18072769 is a deficient number, since it is larger than the sum of its proper divisors (3619391).

18072769 is a wasteful number, since it uses less digits than its factorization.

18072769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 18072769 is about 4251.2079459843. The cubic root of 18072769 is about 262.4268288876.

The spelling of 18072769 in words is "eighteen million, seventy-two thousand, seven hundred sixty-nine".