20722468 has 12 divisors (see below), whose sum is σ = 39053980. Its totient is φ = 9564192.

The previous prime is 20722453. The next prime is 20722519. The reversal of 20722468 is 86422702.

It can be written as a sum of positive squares in 2 ways, for example, as 2930944 + 17791524 = 1712^2 + 4218^2 .

It is a super-2 number, since 2×20722468² = 858841360022048, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199203 + ... + 199306.

Almost surely, 2^20722468 is an apocalyptic number.

It is an amenable number.

20722468 is a deficient number, since it is larger than the sum of its proper divisors (18331512).

20722468 is a wasteful number, since it uses less digits than its factorization.

20722468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398526 (or 398524 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20722468 is about 4552.1937568605. The cubic root of 20722468 is about 274.6716433520.

The spelling of 20722468 in words is "twenty million, seven hundred twenty-two thousand, four hundred sixty-eight".