20034728 has 24 divisors (see below), whose sum is σ = 43699050. Its totient is φ = 8586144.

The previous prime is 20034727. The next prime is 20034731. The reversal of 20034728 is 82743002.

It can be written as a sum of positive squares in only one way, i.e., 11957764 + 8076964 = 3458^2 + 2842^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20034697 and 20034706.

It is not an unprimeable number, because it can be changed into a prime (20034727) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 25163 + ... + 25946.

Almost surely, 2^20034728 is an apocalyptic number.

20034728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20034728 is an abundant number, since it is smaller than the sum of its proper divisors (23664322).

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

20034728 is a wasteful number, since it uses less digits than its factorization.

20034728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51129 (or 51118 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20034728 is about 4476.0169794137. The cubic root of 20034728 is about 271.5987813032.

The spelling of 20034728 in words is "twenty million, thirty-four thousand, seven hundred twenty-eight".