20004928 has 28 divisors (see below), whose sum is σ = 39892732. Its totient is φ = 9953280.

The previous prime is 20004923. The next prime is 20004931. The reversal of 20004928 is 82940002.

It can be written as a sum of positive squares in 2 ways, for example, as 18386944 + 1617984 = 4288^2 + 1272^2 .

It is not an unprimeable number, because it can be changed into a prime (20004923) 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, 14776 + ... + 16072.

Almost surely, 2^20004928 is an apocalyptic number.

It is an amenable number.

20004928 is a deficient number, since it is larger than the sum of its proper divisors (19887804).

20004928 is a wasteful number, since it uses less digits than its factorization.

20004928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550 (or 1540 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 20004928 is about 4472.6868882138. The cubic root of 20004928 is about 271.4640542453.

The spelling of 20004928 in words is "twenty million, four thousand, nine hundred twenty-eight".