18127690 has 16 divisors (see below), whose sum is σ = 37291392. Its totient is φ = 6215184.

The previous prime is 18127679. The next prime is 18127709. The reversal of 18127690 is 9672181.

It is a happy number.

It is a super-2 number, since 2×18127690² = 657226289472200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 129414 + ... + 129553.

It is an arithmetic number, because the mean of its divisors is an integer number (2330712).

Almost surely, 2^18127690 is an apocalyptic number.

18127690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18127690 is an abundant number, since it is smaller than the sum of its proper divisors (19163702).

18127690 is a wasteful number, since it uses less digits than its factorization.

18127690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258981.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 18127690 is about 4257.6625042387. The cubic root of 18127690 is about 262.6923880635.

The spelling of 18127690 in words is "eighteen million, one hundred twenty-seven thousand, six hundred ninety".