18856047 has 8 divisors (see below), whose sum is σ = 28733056. Its totient is φ = 10774872.

The previous prime is 18856031. The next prime is 18856049. The reversal of 18856047 is 74065881.

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

It is not a de Polignac number, because 18856047 - 2⁴ = 18856031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18855996 and 18856014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18856049) 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, 448933 + ... + 448974.

It is an arithmetic number, because the mean of its divisors is an integer number (3591632).

Almost surely, 2^18856047 is an apocalyptic number.

18856047 is a deficient number, since it is larger than the sum of its proper divisors (9877009).

18856047 is an equidigital number, since it uses as much as digits as its factorization.

18856047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897917.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 18856047 is about 4342.3550062149. The cubic root of 18856047 is about 266.1645532416.

The spelling of 18856047 in words is "eighteen million, eight hundred fifty-six thousand, forty-seven".