30936218791 has 2 divisors, whose sum is σ = 30936218792. Its totient is φ = 30936218790.

The previous prime is 30936218759. The next prime is 30936218801. The reversal of 30936218791 is 19781263903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30936218791 - 2⁵ = 30936218759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30936219791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15468109395 + 15468109396.

It is an arithmetic number, because the mean of its divisors is an integer number (15468109396).

Almost surely, 2^30936218791 is an apocalyptic number.

30936218791 is a deficient number, since it is larger than the sum of its proper divisors (1).

30936218791 is an equidigital number, since it uses as much as digits as its factorization.

30936218791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 30936218791 in words is "thirty billion, nine hundred thirty-six million, two hundred eighteen thousand, seven hundred ninety-one".