18572413 has 4 divisors (see below), whose sum is σ = 18596800. Its totient is φ = 18548028.

The previous prime is 18572399. The next prime is 18572417. The reversal of 18572413 is 31427581.

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 18572413 - 2¹⁷ = 18441341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18572417) 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, 11013 + ... + 12586.

It is an arithmetic number, because the mean of its divisors is an integer number (4649200).

Almost surely, 2^18572413 is an apocalyptic number.

It is an amenable number.

18572413 is a deficient number, since it is larger than the sum of its proper divisors (24387).

18572413 is an equidigital number, since it uses as much as digits as its factorization.

18572413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24386.

The product of its digits is 6720, while the sum is 31.

The square root of 18572413 is about 4309.5722525559. The cubic root of 18572413 is about 264.8232498837.

Adding to 18572413 its reverse (31427581), we get a palindrome (49999994).

The spelling of 18572413 in words is "eighteen million, five hundred seventy-two thousand, four hundred thirteen".