20068728 has 32 divisors (see below), whose sum is σ = 50284800. Its totient is φ = 6674528.

The previous prime is 20068709. The next prime is 20068729. The reversal of 20068728 is 82786002.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20068729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16675 + ... + 17837.

It is an arithmetic number, because the mean of its divisors is an integer number (1571400).

Almost surely, 2^20068728 is an apocalyptic number.

It is an amenable number.

20068728 is an abundant number, since it is smaller than the sum of its proper divisors (30216072).

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

20068728 is a wasteful number, since it uses less digits than its factorization.

20068728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 20068728 is about 4479.8133889706. The cubic root of 20068728 is about 271.7523336707.

The spelling of 20068728 in words is "twenty million, sixty-eight thousand, seven hundred twenty-eight".