20722692 has 48 divisors (see below), whose sum is σ = 51477440. Its totient is φ = 6469632.

The previous prime is 20722687. The next prime is 20722769. The reversal of 20722692 is 29622702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21648 + ... + 22584.

Almost surely, 2^20722692 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 20722692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25738720).

20722692 is an abundant number, since it is smaller than the sum of its proper divisors (30754748).

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

20722692 is a wasteful number, since it uses less digits than its factorization.

20722692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060 (or 1058 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20722692 is about 4552.2183603162. The cubic root of 20722692 is about 274.6726330383.

The spelling of 20722692 in words is "twenty million, seven hundred twenty-two thousand, six hundred ninety-two".