20442708 has 162 divisors, whose sum is σ = 64557402. Its totient is φ = 5417280.

The previous prime is 20442707. The next prime is 20442713. The reversal of 20442708 is 80724402.

It can be written as a sum of positive squares in only one way, i.e., 14152644 + 6290064 = 3762^2 + 2508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442707) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 1075923 + ... + 1075941.

Almost surely, 2^20442708 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20442708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32278701).

20442708 is an abundant number, since it is smaller than the sum of its proper divisors (44114694).

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

20442708 is a wasteful number, since it uses less digits than its factorization.

20442708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 20442708 is about 4521.3612994318. The cubic root of 20442708 is about 273.4299869696.

The spelling of 20442708 in words is "twenty million, four hundred forty-two thousand, seven hundred eight".