20191726097 has 2 divisors, whose sum is σ = 20191726098. Its totient is φ = 20191726096.

The previous prime is 20191726067. The next prime is 20191726109. The reversal of 20191726097 is 79062719102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16748501056 + 3443225041 = 129416^2 + 58679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20191726097 is a prime.

It is not a weakly prime, because it can be changed into another prime (20191726067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10095863048 + 10095863049.

It is an arithmetic number, because the mean of its divisors is an integer number (10095863049).

Almost surely, 2^20191726097 is an apocalyptic number.

It is an amenable number.

20191726097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20191726097 is an equidigital number, since it uses as much as digits as its factorization.

20191726097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 44.

The spelling of 20191726097 in words is "twenty billion, one hundred ninety-one million, seven hundred twenty-six thousand, ninety-seven".