20722336 has 24 divisors (see below), whose sum is σ = 41126400. Its totient is φ = 10277568.

The previous prime is 20722319. The next prime is 20722349. The reversal of 20722336 is 63322702.

It is a self number, because there is not a number n which added to its sum of digits gives 20722336.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515 + ... + 6613.

It is an arithmetic number, because the mean of its divisors is an integer number (1713600).

Almost surely, 2^20722336 is an apocalyptic number.

It is an amenable number.

20722336 is a deficient number, since it is larger than the sum of its proper divisors (20404064).

20722336 is a wasteful number, since it uses less digits than its factorization.

20722336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236 (or 5228 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 20722336 is about 4552.1792583333. The cubic root of 20722336 is about 274.6710601407.

The spelling of 20722336 in words is "twenty million, seven hundred twenty-two thousand, three hundred thirty-six".