18163413 has 16 divisors (see below), whose sum is σ = 27125760. Its totient is φ = 12011328.

The previous prime is 18163403. The next prime is 18163441. The reversal of 18163413 is 31436181.

18163413 is a `hidden beast` number, since 18 + 1 + 634 + 13 = 666.

It is not a de Polignac number, because 18163413 - 2⁹ = 18162901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18163403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 781 + ... + 6077.

It is an arithmetic number, because the mean of its divisors is an integer number (1695360).

Almost surely, 2^18163413 is an apocalyptic number.

It is an amenable number.

18163413 is a deficient number, since it is larger than the sum of its proper divisors (8962347).

18163413 is a wasteful number, since it uses less digits than its factorization.

18163413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5433 (or 5427 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 18163413 is about 4261.8555817859. The cubic root of 18163413 is about 262.8648314853.

Adding to 18163413 its reverse (31436181), we get a palindrome (49599594).

The spelling of 18163413 in words is "eighteen million, one hundred sixty-three thousand, four hundred thirteen".