20508708 has 48 divisors (see below), whose sum is σ = 52496640. Its totient is φ = 6180000.

The previous prime is 20508707. The next prime is 20508731. The reversal of 20508708 is 80780502.

It is not an unprimeable number, because it can be changed into a prime (20508703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32823 + ... + 33441.

It is an arithmetic number, because the mean of its divisors is an integer number (1093680).

Almost surely, 2^20508708 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 20508708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26248320).

20508708 is an abundant number, since it is smaller than the sum of its proper divisors (31987932).

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

20508708 is a wasteful number, since it uses less digits than its factorization.

20508708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 20508708 is about 4528.6541046982. The cubic root of 20508708 is about 273.7239302961.

The spelling of 20508708 in words is "twenty million, five hundred eight thousand, seven hundred eight".