20221928 has 16 divisors (see below), whose sum is σ = 39912000. Its totient is φ = 9578736.

The previous prime is 20221921. The next prime is 20221931. The reversal of 20221928 is 82912202.

It is a junction number, because it is equal to n+sod(n) for n = 20221897 and 20221906.

It is not an unprimeable number, because it can be changed into a prime (20221921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66368 + ... + 66671.

It is an arithmetic number, because the mean of its divisors is an integer number (2494500).

Almost surely, 2^20221928 is an apocalyptic number.

It is an amenable number.

20221928 is a deficient number, since it is larger than the sum of its proper divisors (19690072).

20221928 is a wasteful number, since it uses less digits than its factorization.

20221928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133064 (or 133060 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20221928 is about 4496.8798071552. The cubic root of 20221928 is about 272.4420795451.

The spelling of 20221928 in words is "twenty million, two hundred twenty-one thousand, nine hundred twenty-eight".