18279969 has 8 divisors (see below), whose sum is σ = 24400512. Its totient is φ = 12173040.

The previous prime is 18279967. The next prime is 18279997. The reversal of 18279969 is 96997281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18279969 - 2¹ = 18279967 is a prime.

It is a super-2 number, since 2×18279969² = 668314533281922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18279967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312 + ... + 6054.

It is an arithmetic number, because the mean of its divisors is an integer number (3050064).

Almost surely, 2^18279969 is an apocalyptic number.

It is an amenable number.

18279969 is a deficient number, since it is larger than the sum of its proper divisors (6120543).

18279969 is a wasteful number, since it uses less digits than its factorization.

18279969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6807.

The product of its digits is 489888, while the sum is 51.

The square root of 18279969 is about 4275.5080399878. The cubic root of 18279969 is about 263.4259075612.

The spelling of 18279969 in words is "eighteen million, two hundred seventy-nine thousand, nine hundred sixty-nine".