18472481 has 4 divisors (see below), whose sum is σ = 18510000. Its totient is φ = 18434964.

The previous prime is 18472477. The next prime is 18472483. The reversal of 18472481 is 18427481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18472481 - 2² = 18472477 is a prime.

It is a super-2 number, since 2×18472481² = 682465108590722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18472483) 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, 18011 + ... + 19008.

It is an arithmetic number, because the mean of its divisors is an integer number (4627500).

Almost surely, 2^18472481 is an apocalyptic number.

It is an amenable number.

18472481 is a deficient number, since it is larger than the sum of its proper divisors (37519).

18472481 is an equidigital number, since it uses as much as digits as its factorization.

18472481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37518.

The product of its digits is 14336, while the sum is 35.

The square root of 18472481 is about 4297.9624242192. The cubic root of 18472481 is about 264.3474200486.

The spelling of 18472481 in words is "eighteen million, four hundred seventy-two thousand, four hundred eighty-one".