18741613 has 4 divisors (see below), whose sum is σ = 20445408. Its totient is φ = 17037820.

The previous prime is 18741601. The next prime is 18741617. The reversal of 18741613 is 31614781.

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 18741613 - 2⁹ = 18741101 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18741617) 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, 851881 + ... + 851902.

It is an arithmetic number, because the mean of its divisors is an integer number (5111352).

Almost surely, 2^18741613 is an apocalyptic number.

It is an amenable number.

18741613 is a deficient number, since it is larger than the sum of its proper divisors (1703795).

18741613 is a wasteful number, since it uses less digits than its factorization.

18741613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703794.

The product of its digits is 4032, while the sum is 31.

The square root of 18741613 is about 4329.1584632582. The cubic root of 18741613 is about 265.6250251995.

The spelling of 18741613 in words is "eighteen million, seven hundred forty-one thousand, six hundred thirteen".