20722650 has 48 divisors (see below), whose sum is σ = 55350624. Its totient is φ = 5100480.

The previous prime is 20722649. The next prime is 20722661. The reversal of 20722650 is 5622702.

It is a self number, because there is not a number n which added to its sum of digits gives 20722650.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3364 + ... + 7263.

It is an arithmetic number, because the mean of its divisors is an integer number (1153138).

Almost surely, 2^20722650 is an apocalyptic number.

20722650 is an abundant number, since it is smaller than the sum of its proper divisors (34627974).

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

20722650 is a wasteful number, since it uses less digits than its factorization.

20722650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655 (or 10650 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20722650 is about 4552.2137471784. The cubic root of 20722650 is about 274.6724474726.

The spelling of 20722650 in words is "twenty million, seven hundred twenty-two thousand, six hundred fifty".