20021059 has 2 divisors, whose sum is σ = 20021060. Its totient is φ = 20021058.

The previous prime is 20021021. The next prime is 20021069. The reversal of 20021059 is 95012002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20021059 - 2¹⁵ = 19988291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20021069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010529 + 10010530.

It is an arithmetic number, because the mean of its divisors is an integer number (10010530).

Almost surely, 2^20021059 is an apocalyptic number.

20021059 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021059 is an equidigital number, since it uses as much as digits as its factorization.

20021059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20021059 is about 4474.4898033184. The cubic root of 20021059 is about 271.5369997746.

The spelling of 20021059 in words is "twenty million, twenty-one thousand, fifty-nine".