20202200021909 has 2 divisors, whose sum is σ = 20202200021910. Its totient is φ = 20202200021908.

The previous prime is 20202200021881. The next prime is 20202200022007. The reversal of 20202200021909 is 90912000220202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19958529445009 + 243670576900 = 4467497^2 + 493630^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202200021909 - 2¹⁶ = 20202199956373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202200071909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101100010954 + 10101100010955.

It is an arithmetic number, because the mean of its divisors is an integer number (10101100010955).

Almost surely, 2^{20202200021909} is an apocalyptic number.

It is an amenable number.

20202200021909 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202200021909 is an equidigital number, since it uses as much as digits as its factorization.

20202200021909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 20202200021909 in words is "twenty trillion, two hundred two billion, two hundred million, twenty-one thousand, nine hundred nine".