20028031 has 2 divisors, whose sum is σ = 20028032. Its totient is φ = 20028030.

The previous prime is 20028017. The next prime is 20028053. The reversal of 20028031 is 13082002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20028031 - 2⁵ = 20027999 is a prime.

It is a super-2 number, since 2×20028031² = 802244051473922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20027996 and 20028014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20028731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10014015 + 10014016.

It is an arithmetic number, because the mean of its divisors is an integer number (10014016).

Almost surely, 2^20028031 is an apocalyptic number.

20028031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20028031 is an equidigital number, since it uses as much as digits as its factorization.

20028031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20028031 is about 4475.2688187415. The cubic root of 20028031 is about 271.5685155276.

The spelling of 20028031 in words is "twenty million, twenty-eight thousand, thirty-one".