20798456 has 32 divisors (see below), whose sum is σ = 45204480. Its totient is φ = 8786400.

The previous prime is 20798447. The next prime is 20798461. The reversal of 20798456 is 65489702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1361 + ... + 6591.

It is an arithmetic number, because the mean of its divisors is an integer number (1412640).

Almost surely, 2^20798456 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 20798456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22602240).

20798456 is an abundant number, since it is smaller than the sum of its proper divisors (24406024).

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

20798456 is a wasteful number, since it uses less digits than its factorization.

20798456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5315 (or 5311 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 20798456 is about 4560.5324250574. The cubic root of 20798456 is about 275.0069684185.

The spelling of 20798456 in words is "twenty million, seven hundred ninety-eight thousand, four hundred fifty-six".