20010223291 has 2 divisors, whose sum is σ = 20010223292. Its totient is φ = 20010223290.

The previous prime is 20010223273. The next prime is 20010223327. The reversal of 20010223291 is 19232201002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20010223291 - 2³³ = 11420288699 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010223091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005111645 + 10005111646.

It is an arithmetic number, because the mean of its divisors is an integer number (10005111646).

Almost surely, 2^20010223291 is an apocalyptic number.

20010223291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010223291 is an equidigital number, since it uses as much as digits as its factorization.

20010223291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20010223291 its reverse (19232201002), we get a palindrome (39242424293).

The spelling of 20010223291 in words is "twenty billion, ten million, two hundred twenty-three thousand, two hundred ninety-one".