20874734791 has 2 divisors, whose sum is σ = 20874734792. Its totient is φ = 20874734790.

The previous prime is 20874734743. The next prime is 20874734801. The reversal of 20874734791 is 19743747802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20874734791 - 2⁷ = 20874734663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20874734191) 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, 10437367395 + 10437367396.

It is an arithmetic number, because the mean of its divisors is an integer number (10437367396).

Almost surely, 2^20874734791 is an apocalyptic number.

20874734791 is a deficient number, since it is larger than the sum of its proper divisors (1).

20874734791 is an equidigital number, since it uses as much as digits as its factorization.

20874734791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 20874734791 in words is "twenty billion, eight hundred seventy-four million, seven hundred thirty-four thousand, seven hundred ninety-one".