20799936 has 56 divisors (see below), whose sum is σ = 61153040. Its totient is φ = 6932736.

The previous prime is 20799913. The next prime is 20799937. The reversal of 20799936 is 63999702.

It is a junction number, because it is equal to n+sod(n) for n = 20799891 and 20799900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20799937) 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 7 ways as a sum of consecutive naturals, for example, 4291 + ... + 7746.

Almost surely, 2^20799936 is an apocalyptic number.

It is an amenable number.

20799936 is an abundant number, since it is smaller than the sum of its proper divisors (40353104).

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

20799936 is a wasteful number, since it uses less digits than its factorization.

20799936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12058 (or 12042 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 20799936 is about 4560.6946839270. The cubic root of 20799936 is about 275.0134913491.

The spelling of 20799936 in words is "twenty million, seven hundred ninety-nine thousand, nine hundred thirty-six".