18471882 has 32 divisors (see below), whose sum is σ = 43404480. Its totient is φ = 5166720.

The previous prime is 18471881. The next prime is 18471889. The reversal of 18471882 is 28817481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 18471882.

It is not an unprimeable number, because it can be changed into a prime (18471881) 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, 9907 + ... + 11622.

It is an arithmetic number, because the mean of its divisors is an integer number (1356390).

Almost surely, 2^18471882 is an apocalyptic number.

18471882 is an abundant number, since it is smaller than the sum of its proper divisors (24932598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18471882 is a wasteful number, since it uses less digits than its factorization.

18471882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21558.

The product of its digits is 28672, while the sum is 39.

The square root of 18471882 is about 4297.8927394713. The cubic root of 18471882 is about 264.3445627205.

The spelling of 18471882 in words is "eighteen million, four hundred seventy-one thousand, eight hundred eighty-two".