18494377 has 4 divisors (see below), whose sum is σ = 20175696. Its totient is φ = 16813060.

The previous prime is 18494363. The next prime is 18494381. The reversal of 18494377 is 77349481.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77349481 = 11 ⋅7031771.

It is a de Polignac number, because none of the positive numbers 2^k-18494377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18494347) 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, 840643 + ... + 840664.

It is an arithmetic number, because the mean of its divisors is an integer number (5043924).

Almost surely, 2^18494377 is an apocalyptic number.

It is an amenable number.

18494377 is a deficient number, since it is larger than the sum of its proper divisors (1681319).

18494377 is a wasteful number, since it uses less digits than its factorization.

18494377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681318.

The product of its digits is 169344, while the sum is 43.

The square root of 18494377 is about 4300.5089233717. The cubic root of 18494377 is about 264.4518251843.

It can be divided in two parts, 1849 and 4377, that added together give a palindrome (6226).

The spelling of 18494377 in words is "eighteen million, four hundred ninety-four thousand, three hundred seventy-seven".