18340807 has 6 divisors (see below), whose sum is σ = 19483448. Its totient is φ = 17261664.

The previous prime is 18340769. The next prime is 18340813. The reversal of 18340807 is 70804381.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18340807 is a prime.

It is a super-2 number, since 2×18340807² = 672770402822498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31443 + ... + 32020.

Almost surely, 2^18340807 is an apocalyptic number.

18340807 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18340807 is a deficient number, since it is larger than the sum of its proper divisors (1142641).

18340807 is an equidigital number, since it uses as much as digits as its factorization.

18340807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63497 (or 63480 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18340807 is about 4282.6168402041. The cubic root of 18340807 is about 263.7178219693.

The spelling of 18340807 in words is "eighteen million, three hundred forty thousand, eight hundred seven".