20816792 has 16 divisors (see below), whose sum is σ = 40086960. Its totient is φ = 10126944.

The previous prime is 20816791. The next prime is 20816797. The reversal of 20816792 is 29761802.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20816791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34868 + ... + 35459.

It is an arithmetic number, because the mean of its divisors is an integer number (2505435).

Almost surely, 2^20816792 is an apocalyptic number.

It is an amenable number.

20816792 is a deficient number, since it is larger than the sum of its proper divisors (19270168).

20816792 is a wasteful number, since it uses less digits than its factorization.

20816792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70370 (or 70366 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 20816792 is about 4562.5422737768. The cubic root of 20816792 is about 275.0877604199.

The spelling of 20816792 in words is "twenty million, eight hundred sixteen thousand, seven hundred ninety-two".