18631214 has 16 divisors (see below), whose sum is σ = 32224608. Its totient is φ = 7913472.

The previous prime is 18631199. The next prime is 18631231. The reversal of 18631214 is 41213681.

It is a super-2 number, since 2×18631214² = 694244270227592, which contains 22 as substring.

It is a congruent number.

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, 4307 + ... + 7470.

It is an arithmetic number, because the mean of its divisors is an integer number (2014038).

Almost surely, 2^18631214 is an apocalyptic number.

18631214 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18631214 is a deficient number, since it is larger than the sum of its proper divisors (13593394).

18631214 is a wasteful number, since it uses less digits than its factorization.

18631214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11899.

The product of its digits is 1152, while the sum is 26.

The square root of 18631214 is about 4316.3890000787. The cubic root of 18631214 is about 265.1024357751.

Adding to 18631214 its reverse (41213681), we get a palindrome (59844895).

The spelling of 18631214 in words is "eighteen million, six hundred thirty-one thousand, two hundred fourteen".