20907796 has 48 divisors (see below), whose sum is σ = 45722880. Its totient is φ = 8144640.

The previous prime is 20907781. The next prime is 20907823. The reversal of 20907796 is 69770902.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25440 + ... + 26248.

It is an arithmetic number, because the mean of its divisors is an integer number (952560).

Almost surely, 2^20907796 is an apocalyptic number.

20907796 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20907796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22861440).

20907796 is an abundant number, since it is smaller than the sum of its proper divisors (24815084).

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

20907796 is a wasteful number, since it uses less digits than its factorization.

20907796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 20907796 is about 4572.5043466354. The cubic root of 20907796 is about 275.4880413517.

The spelling of 20907796 in words is "twenty million, nine hundred seven thousand, seven hundred ninety-six".