18478827 has 16 divisors (see below), whose sum is σ = 27456000. Its totient is φ = 12283272.

The previous prime is 18478783. The next prime is 18478843. The reversal of 18478827 is 72887481.

It is not a de Polignac number, because 18478827 - 2⁷ = 18478699 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18478897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11074 + ... + 12632.

It is an arithmetic number, because the mean of its divisors is an integer number (1716000).

Almost surely, 2^18478827 is an apocalyptic number.

18478827 is a deficient number, since it is larger than the sum of its proper divisors (8977173).

18478827 is a wasteful number, since it uses less digits than its factorization.

18478827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007 (or 2001 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 18478827 is about 4298.7006176285. The cubic root of 18478827 is about 264.3776877147.

The spelling of 18478827 in words is "eighteen million, four hundred seventy-eight thousand, eight hundred twenty-seven".