20402703572191 has 2 divisors, whose sum is σ = 20402703572192. Its totient is φ = 20402703572190.

The previous prime is 20402703572171. The next prime is 20402703572291. The reversal of 20402703572191 is 19127530720402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20402703572191 - 2²⁵ = 20402670017759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20402703572171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201351786095 + 10201351786096.

It is an arithmetic number, because the mean of its divisors is an integer number (10201351786096).

Almost surely, 2^{20402703572191} is an apocalyptic number.

20402703572191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402703572191 is an equidigital number, since it uses as much as digits as its factorization.

20402703572191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 20402703572191 in words is "twenty trillion, four hundred two billion, seven hundred three million, five hundred seventy-two thousand, one hundred ninety-one".