20728076 has 12 divisors (see below), whose sum is σ = 36309000. Its totient is φ = 10354080.

The previous prime is 20728067. The next prime is 20728079. The reversal of 20728076 is 67082702.

It is not an unprimeable number, because it can be changed into a prime (20728079) 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, 4175 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (3025750).

Almost surely, 2^20728076 is an apocalyptic number.

It is an amenable number.

20728076 is a deficient number, since it is larger than the sum of its proper divisors (15580924).

20728076 is a wasteful number, since it uses less digits than its factorization.

20728076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984 (or 4982 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 20728076 is about 4552.8096819437. The cubic root of 20728076 is about 274.6964187092.

The spelling of 20728076 in words is "twenty million, seven hundred twenty-eight thousand, seventy-six".