18739486 has 8 divisors (see below), whose sum is σ = 28763064. Its totient is φ = 9151800.

The previous prime is 18739477. The next prime is 18739489. The reversal of 18739486 is 68493781.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18739489) 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, 108865 + ... + 109036.

It is an arithmetic number, because the mean of its divisors is an integer number (3595383).

Almost surely, 2^18739486 is an apocalyptic number.

18739486 is a deficient number, since it is larger than the sum of its proper divisors (10023578).

18739486 is a wasteful number, since it uses less digits than its factorization.

18739486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217946.

The product of its digits is 290304, while the sum is 46.

The square root of 18739486 is about 4328.9127965345. The cubic root of 18739486 is about 265.6149761569.

The spelling of 18739486 in words is "eighteen million, seven hundred thirty-nine thousand, four hundred eighty-six".