18450969 has 16 divisors (see below), whose sum is σ = 25133952. Its totient is φ = 12037248.

The previous prime is 18450961. The next prime is 18451019. The reversal of 18450969 is 96905481.

It is not a de Polignac number, because 18450969 - 2³ = 18450961 is a prime.

It is a super-2 number, since 2×18450969² = 680876514077922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18450969.

It is not an unprimeable number, because it can be changed into a prime (18450961) 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, 37644 + ... + 38130.

It is an arithmetic number, because the mean of its divisors is an integer number (1570872).

Almost surely, 2^18450969 is an apocalyptic number.

It is an amenable number.

18450969 is a deficient number, since it is larger than the sum of its proper divisors (6682983).

18450969 is a wasteful number, since it uses less digits than its factorization.

18450969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 18450969 is about 4295.4591139947. The cubic root of 18450969 is about 264.2447655364.

The spelling of 18450969 in words is "eighteen million, four hundred fifty thousand, nine hundred sixty-nine".