20793456 has 80 divisors (see below), whose sum is σ = 60313600. Its totient is φ = 6858432.

The previous prime is 20793433. The next prime is 20793457. The reversal of 20793456 is 65439702.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20793456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20793457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54675 + ... + 55053.

It is an arithmetic number, because the mean of its divisors is an integer number (753920).

Almost surely, 2^20793456 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 20793456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30156800).

20793456 is an abundant number, since it is smaller than the sum of its proper divisors (39520144).

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

20793456 is a wasteful number, since it uses less digits than its factorization.

20793456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20793456 is about 4559.9842104990. The cubic root of 20793456 is about 274.9849292016.

The spelling of 20793456 in words is "twenty million, seven hundred ninety-three thousand, four hundred fifty-six".