18505069 has 16 divisors (see below), whose sum is σ = 21833280. Its totient is φ = 15500160.

The previous prime is 18505057. The next prime is 18505073. The reversal of 18505069 is 96050581.

It is a cyclic number.

It is not a de Polignac number, because 18505069 - 2⁵ = 18505037 is a prime.

It is a super-2 number, since 2×18505069² = 684875157389522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18505049) 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, 6537 + ... + 8929.

It is an arithmetic number, because the mean of its divisors is an integer number (1364580).

Almost surely, 2^18505069 is an apocalyptic number.

18505069 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18505069 is a deficient number, since it is larger than the sum of its proper divisors (3328211).

18505069 is a wasteful number, since it uses less digits than its factorization.

18505069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 18505069 is about 4301.7518524434. The cubic root of 18505069 is about 264.5027771431.

The spelling of 18505069 in words is "eighteen million, five hundred five thousand, sixty-nine".