20492608 has 28 divisors (see below), whose sum is σ = 41096692. Its totient is φ = 10137600.

The previous prime is 20492603. The next prime is 20492627. The reversal of 20492608 is 80629402.

It can be written as a sum of positive squares in 2 ways, for example, as 6594624 + 13897984 = 2568^2 + 3728^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20492608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20492603) 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, 4558 + ... + 7858.

It is an arithmetic number, because the mean of its divisors is an integer number (1467739).

Almost surely, 2^20492608 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 20492608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20548346).

20492608 is an abundant number, since it is smaller than the sum of its proper divisors (20604084).

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

20492608 is an equidigital number, since it uses as much as digits as its factorization.

20492608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20492608 is about 4526.8761856273. The cubic root of 20492608 is about 273.6522841612.

The spelling of 20492608 in words is "twenty million, four hundred ninety-two thousand, six hundred eight".