20443928 has 16 divisors (see below), whose sum is σ = 40587480. Its totient is φ = 9620608.

The previous prime is 20443921. The next prime is 20443933. The reversal of 20443928 is 82934402.

It is a junction number, because it is equal to n+sod(n) for n = 20443894 and 20443903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443921) 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, 75026 + ... + 75297.

Almost surely, 2^20443928 is an apocalyptic number.

It is an amenable number.

20443928 is a deficient number, since it is larger than the sum of its proper divisors (20143552).

20443928 is a wasteful number, since it uses less digits than its factorization.

20443928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150346 (or 150342 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20443928 is about 4521.4962125385. The cubic root of 20443928 is about 273.4354262025.

The spelling of 20443928 in words is "twenty million, four hundred forty-three thousand, nine hundred twenty-eight".