18427472 has 20 divisors (see below), whose sum is σ = 40803936. Its totient is φ = 7897440.

The previous prime is 18427427. The next prime is 18427477. The reversal of 18427472 is 27472481.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18427477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82154 + ... + 82377.

Almost surely, 2^18427472 is an apocalyptic number.

It is an amenable number.

18427472 is an abundant number, since it is smaller than the sum of its proper divisors (22376464).

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

18427472 is a wasteful number, since it uses less digits than its factorization.

18427472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164546 (or 164540 counting only the distinct ones).

The product of its digits is 25088, while the sum is 35.

The square root of 18427472 is about 4292.7231450444. The cubic root of 18427472 is about 264.1325474592.

The spelling of 18427472 in words is "eighteen million, four hundred twenty-seven thousand, four hundred seventy-two".