18137707 has 8 divisors (see below), whose sum is σ = 20804832. Its totient is φ = 15489600.

The previous prime is 18137699. The next prime is 18137711. The reversal of 18137707 is 70773181.

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

It is not a de Polignac number, because 18137707 - 2³ = 18137699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18137737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2644 + ... + 6577.

It is an arithmetic number, because the mean of its divisors is an integer number (2600604).

Almost surely, 2^18137707 is an apocalyptic number.

18137707 is a deficient number, since it is larger than the sum of its proper divisors (2667125).

18137707 is an equidigital number, since it uses as much as digits as its factorization.

18137707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9509.

The product of its (nonzero) digits is 8232, while the sum is 34.

The square root of 18137707 is about 4258.8386914745. The cubic root of 18137707 is about 262.7407653456.

The spelling of 18137707 in words is "eighteen million, one hundred thirty-seven thousand, seven hundred seven".