20181614 has 12 divisors (see below), whose sum is σ = 30664296. Its totient is φ = 9960912.

The previous prime is 20181583. The next prime is 20181619. The reversal of 20181614 is 41618102.

It is a self number, because there is not a number n which added to its sum of digits gives 20181614.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20181619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64322 + ... + 64634.

It is an arithmetic number, because the mean of its divisors is an integer number (2555358).

Almost surely, 2^20181614 is an apocalyptic number.

20181614 is a deficient number, since it is larger than the sum of its proper divisors (10482682).

20181614 is an equidigital number, since it uses as much as digits as its factorization.

20181614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 20181614 is about 4492.3951295495. The cubic root of 20181614 is about 272.2609142158.

Adding to 20181614 its reverse (41618102), we get a palindrome (61799716).

The spelling of 20181614 in words is "twenty million, one hundred eighty-one thousand, six hundred fourteen".