20722941 has 12 divisors (see below), whose sum is σ = 29975868. Its totient is φ = 13795584.

The previous prime is 20722937. The next prime is 20722951. The reversal of 20722941 is 14922702.

It can be written as a sum of positive squares in 2 ways, for example, as 7371225 + 13351716 = 2715^2 + 3654^2 .

It is not a de Polignac number, because 20722941 - 2² = 20722937 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20722921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7981 + ... + 10253.

It is an arithmetic number, because the mean of its divisors is an integer number (2497989).

Almost surely, 2^20722941 is an apocalyptic number.

It is an amenable number.

20722941 is a deficient number, since it is larger than the sum of its proper divisors (9252927).

20722941 is a wasteful number, since it uses less digits than its factorization.

20722941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292 (or 3289 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20722941 is about 4552.2457095372. The cubic root of 20722941 is about 274.6737331722.

The spelling of 20722941 in words is "twenty million, seven hundred twenty-two thousand, nine hundred forty-one".