20071204091 has 2 divisors, whose sum is σ = 20071204092. Its totient is φ = 20071204090.

The previous prime is 20071204067. The next prime is 20071204099. The reversal of 20071204091 is 19040217002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20071204091 - 2¹⁰ = 20071203067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20071204091.

It is not a weakly prime, because it can be changed into another prime (20071204099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10035602045 + 10035602046.

It is an arithmetic number, because the mean of its divisors is an integer number (10035602046).

Almost surely, 2^20071204091 is an apocalyptic number.

20071204091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20071204091 is an equidigital number, since it uses as much as digits as its factorization.

20071204091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The spelling of 20071204091 in words is "twenty billion, seventy-one million, two hundred four thousand, ninety-one".