20618142 has 8 divisors (see below), whose sum is σ = 41236296. Its totient is φ = 6872712.

The previous prime is 20618141. The next prime is 20618197. The reversal of 20618142 is 24181602.

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

20618142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20618141) 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, 1718173 + ... + 1718184.

It is an arithmetic number, because the mean of its divisors is an integer number (5154537).

Almost surely, 2^20618142 is an apocalyptic number.

20618142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20618142 is a wasteful number, since it uses less digits than its factorization.

20618142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3436362.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20618142 is about 4540.7204274212. The cubic root of 20618142 is about 274.2099284514.

Adding to 20618142 its reverse (24181602), we get a palindrome (44799744).

The spelling of 20618142 in words is "twenty million, six hundred eighteen thousand, one hundred forty-two".