20842770084443 has 2 divisors, whose sum is σ = 20842770084444. Its totient is φ = 20842770084442.

The previous prime is 20842770084419. The next prime is 20842770084469. The reversal of 20842770084443 is 34448007724802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20842770084443 - 2¹⁸ = 20842769822299 is a prime.

It is a super-2 number, since 2×20842770084443² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20842770084473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10421385042221 + 10421385042222.

It is an arithmetic number, because the mean of its divisors is an integer number (10421385042222).

Almost surely, 2^{20842770084443} is an apocalyptic number.

20842770084443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20842770084443 is an equidigital number, since it uses as much as digits as its factorization.

20842770084443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9633792, while the sum is 53.

The spelling of 20842770084443 in words is "twenty trillion, eight hundred forty-two billion, seven hundred seventy million, eighty-four thousand, four hundred forty-three".