20728883 has 16 divisors (see below), whose sum is σ = 24572160. Its totient is φ = 17118816.

The previous prime is 20728859. The next prime is 20728891. The reversal of 20728883 is 38882702.

It is a cyclic number.

It is not a de Polignac number, because 20728883 - 2¹⁴ = 20712499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20728283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21416 + ... + 22362.

It is an arithmetic number, because the mean of its divisors is an integer number (1535760).

Almost surely, 2^20728883 is an apocalyptic number.

20728883 is a deficient number, since it is larger than the sum of its proper divisors (3843277).

20728883 is an equidigital number, since it uses as much as digits as its factorization.

20728883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 20728883 is about 4552.8983076717. The cubic root of 20728883 is about 274.6999835542.

The spelling of 20728883 in words is "twenty million, seven hundred twenty-eight thousand, eight hundred eighty-three".