18642047 has 8 divisors (see below), whose sum is σ = 19796400. Its totient is φ = 17494144.

The previous prime is 18642037. The next prime is 18642101. The reversal of 18642047 is 74024681.

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

It is a cyclic number.

It is not a de Polignac number, because 18642047 - 2¹² = 18637951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18642017) 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, 5204 + ... + 8022.

It is an arithmetic number, because the mean of its divisors is an integer number (2474550).

Almost surely, 2^18642047 is an apocalyptic number.

18642047 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18642047 is a deficient number, since it is larger than the sum of its proper divisors (1154353).

18642047 is a wasteful number, since it uses less digits than its factorization.

18642047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 18642047 is about 4317.6436860862. The cubic root of 18642047 is about 265.1538065242.

The spelling of 18642047 in words is "eighteen million, six hundred forty-two thousand, forty-seven".