20722448 has 20 divisors (see below), whose sum is σ = 41896128. Its totient is φ = 9910560.

The previous prime is 20722447. The next prime is 20722451. The reversal of 20722448 is 84422702.

It is a super-2 number, since 2×20722448² = 858839702225408, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20722448.

It is not an unprimeable number, because it can be changed into a prime (20722447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27788 + ... + 28523.

Almost surely, 2^20722448 is an apocalyptic number.

It is an amenable number.

20722448 is an abundant number, since it is smaller than the sum of its proper divisors (21173680).

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

20722448 is a wasteful number, since it uses less digits than its factorization.

20722448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56342 (or 56336 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 20722448 is about 4552.1915601170. The cubic root of 20722448 is about 274.6715549868.

The spelling of 20722448 in words is "twenty million, seven hundred twenty-two thousand, four hundred forty-eight".