18413761 has 4 divisors (see below), whose sum is σ = 18842032. Its totient is φ = 17985492.

The previous prime is 18413749. The next prime is 18413767. The reversal of 18413761 is 16731481.

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 18413761 - 2⁹ = 18413249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18413767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214071 + ... + 214156.

It is an arithmetic number, because the mean of its divisors is an integer number (4710508).

Almost surely, 2^18413761 is an apocalyptic number.

It is an amenable number.

18413761 is a deficient number, since it is larger than the sum of its proper divisors (428271).

18413761 is an equidigital number, since it uses as much as digits as its factorization.

18413761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428270.

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

The square root of 18413761 is about 4291.1258429461. The cubic root of 18413761 is about 264.0670217425.

The spelling of 18413761 in words is "eighteen million, four hundred thirteen thousand, seven hundred sixty-one".