20718042 has 16 divisors (see below), whose sum is σ = 41604192. Its totient is φ = 6878000.

The previous prime is 20718031. The next prime is 20718073. The reversal of 20718042 is 24081702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5373 + ... + 8384.

It is an arithmetic number, because the mean of its divisors is an integer number (2600262).

Almost surely, 2^20718042 is an apocalyptic number.

20718042 is an abundant number, since it is smaller than the sum of its proper divisors (20886150).

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

20718042 is a wasteful number, since it uses less digits than its factorization.

20718042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14013.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20718042 is about 4551.7075916627. The cubic root of 20718042 is about 274.6520867487.

Adding to 20718042 its reverse (24081702), we get a palindrome (44799744).

The spelling of 20718042 in words is "twenty million, seven hundred eighteen thousand, forty-two".