20708142 has 128 divisors (see below), whose sum is σ = 56899584. Its totient is φ = 4866048.

The previous prime is 20708141. The next prime is 20708179. The reversal of 20708142 is 24180702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20708141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 213438 + ... + 213534.

It is an arithmetic number, because the mean of its divisors is an integer number (444528).

Almost surely, 2^20708142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20708142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28449792).

20708142 is an abundant number, since it is smaller than the sum of its proper divisors (36191442).

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

20708142 is a wasteful number, since it uses less digits than its factorization.

20708142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162.

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

The square root of 20708142 is about 4550.6199577640. The cubic root of 20708142 is about 274.6083327931.

Adding to 20708142 its reverse (24180702), we get a palindrome (44888844).

The spelling of 20708142 in words is "twenty million, seven hundred eight thousand, one hundred forty-two".