18740427 has 8 divisors (see below), whose sum is σ = 25113600. Its totient is φ = 12430440.

The previous prime is 18740411. The next prime is 18740431. The reversal of 18740427 is 72404781.

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

It is not a de Polignac number, because 18740427 - 2⁴ = 18740411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18740437) 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, 15099 + ... + 16292.

It is an arithmetic number, because the mean of its divisors is an integer number (3139200).

Almost surely, 2^18740427 is an apocalyptic number.

18740427 is a deficient number, since it is larger than the sum of its proper divisors (6373173).

18740427 is a wasteful number, since it uses less digits than its factorization.

18740427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31593.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 18740427 is about 4329.0214829682. The cubic root of 18740427 is about 265.6194220190.

The spelling of 18740427 in words is "eighteen million, seven hundred forty thousand, four hundred twenty-seven".