20202209843 has 2 divisors, whose sum is σ = 20202209844. Its totient is φ = 20202209842.

The previous prime is 20202209837. The next prime is 20202209927. The reversal of 20202209843 is 34890220202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202209843 is a prime.

It is not a weakly prime, because it can be changed into another prime (20202209803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101104921 + 10101104922.

It is an arithmetic number, because the mean of its divisors is an integer number (10101104922).

Almost surely, 2^20202209843 is an apocalyptic number.

20202209843 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202209843 is an equidigital number, since it uses as much as digits as its factorization.

20202209843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 20202209843 in words is "twenty billion, two hundred two million, two hundred nine thousand, eight hundred forty-three".