18740807 has 4 divisors (see below), whose sum is σ = 18836136. Its totient is φ = 18645480.

The previous prime is 18740797. The next prime is 18740849. The reversal of 18740807 is 70804781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70804781 = 2243 ⋅31567.

It is a cyclic number.

It is not a de Polignac number, because 18740807 - 2⁸ = 18740551 is a prime.

It is a super-2 number, since 2×18740807² = 702435694022498, 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 (18740857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47369 + ... + 47762.

It is an arithmetic number, because the mean of its divisors is an integer number (4709034).

Almost surely, 2^18740807 is an apocalyptic number.

18740807 is a deficient number, since it is larger than the sum of its proper divisors (95329).

18740807 is an equidigital number, since it uses as much as digits as its factorization.

18740807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95328.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 18740807 is about 4329.0653725718. The cubic root of 18740807 is about 265.6212173302.

The spelling of 18740807 in words is "eighteen million, seven hundred forty thousand, eight hundred seven".