18372427 has 8 divisors (see below), whose sum is σ = 19568736. Its totient is φ = 17188992.

The previous prime is 18372401. The next prime is 18372433. The reversal of 18372427 is 72427381.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18372427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18372392 and 18372401.

It is not an unprimeable number, because it can be changed into a prime (18372437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183 + ... + 6064.

It is an arithmetic number, because the mean of its divisors is an integer number (2446092).

Almost surely, 2^18372427 is an apocalyptic number.

18372427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18372427 is a deficient number, since it is larger than the sum of its proper divisors (1196309).

18372427 is a wasteful number, since it uses less digits than its factorization.

18372427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6437.

The product of its digits is 18816, while the sum is 34.

The square root of 18372427 is about 4286.3069185489. The cubic root of 18372427 is about 263.8692869519.

The spelling of 18372427 in words is "eighteen million, three hundred seventy-two thousand, four hundred twenty-seven".