20028863 has 2 divisors, whose sum is σ = 20028864. Its totient is φ = 20028862.

The previous prime is 20028829. The next prime is 20028871. The reversal of 20028863 is 36882002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20028863 - 2¹⁴ = 20012479 is a prime.

It is a super-3 number, since 3×20028863³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20028823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10014431 + 10014432.

It is an arithmetic number, because the mean of its divisors is an integer number (10014432).

Almost surely, 2^20028863 is an apocalyptic number.

20028863 is a deficient number, since it is larger than the sum of its proper divisors (1).

20028863 is an equidigital number, since it uses as much as digits as its factorization.

20028863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20028863 is about 4475.3617730861. The cubic root of 20028863 is about 271.5722759552.

The spelling of 20028863 in words is "twenty million, twenty-eight thousand, eight hundred sixty-three".