18713386 has 8 divisors (see below), whose sum is σ = 28139940. Its totient is φ = 9333408.

The previous prime is 18713353. The next prime is 18713393. The reversal of 18713386 is 68331781.

It can be written as a sum of positive squares in 2 ways, for example, as 14969161 + 3744225 = 3869^2 + 1935^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10621 + ... + 12256.

Almost surely, 2^18713386 is an apocalyptic number.

18713386 is a deficient number, since it is larger than the sum of its proper divisors (9426554).

18713386 is a wasteful number, since it uses less digits than its factorization.

18713386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23288.

The product of its digits is 24192, while the sum is 37.

The square root of 18713386 is about 4325.8971323877. The cubic root of 18713386 is about 265.4916043654.

The spelling of 18713386 in words is "eighteen million, seven hundred thirteen thousand, three hundred eighty-six".