18816369 has 32 divisors (see below), whose sum is σ = 30772224. Its totient is φ = 10063680.

The previous prime is 18816367. The next prime is 18816377. The reversal of 18816369 is 96361881.

It is not a de Polignac number, because 18816369 - 2¹ = 18816367 is a prime.

It is a super-2 number, since 2×18816369² = 708111484688322, 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 18816369.

It is not an unprimeable number, because it can be changed into a prime (18816361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8914 + ... + 10820.

It is an arithmetic number, because the mean of its divisors is an integer number (961632).

Almost surely, 2^18816369 is an apocalyptic number.

It is an amenable number.

18816369 is a deficient number, since it is larger than the sum of its proper divisors (11955855).

18816369 is a wasteful number, since it uses less digits than its factorization.

18816369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957.

The product of its digits is 62208, while the sum is 42.

The square root of 18816369 is about 4337.7838812002. The cubic root of 18816369 is about 265.9777291170.

The spelling of 18816369 in words is "eighteen million, eight hundred sixteen thousand, three hundred sixty-nine".