20090633221 has 2 divisors, whose sum is σ = 20090633222. Its totient is φ = 20090633220.

The previous prime is 20090633197. The next prime is 20090633257. The reversal of 20090633221 is 12233609002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15928964100 + 4161669121 = 126210^2 + 64511^2 .

It is a cyclic number.

It is not a de Polignac number, because 20090633221 - 2²⁹ = 19553762309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20090633221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20090633621) 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, 10045316610 + 10045316611.

It is an arithmetic number, because the mean of its divisors is an integer number (10045316611).

Almost surely, 2^20090633221 is an apocalyptic number.

It is an amenable number.

20090633221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20090633221 is an equidigital number, since it uses as much as digits as its factorization.

20090633221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 20090633221 in words is "twenty billion, ninety million, six hundred thirty-three thousand, two hundred twenty-one".