20097335261 has 2 divisors, whose sum is σ = 20097335262. Its totient is φ = 20097335260.

The previous prime is 20097335257. The next prime is 20097335287. The reversal of 20097335261 is 16253379002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12060212761 + 8037122500 = 109819^2 + 89650^2 .

It is a cyclic number.

It is not a de Polignac number, because 20097335261 - 2² = 20097335257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20097335201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10048667630 + 10048667631.

It is an arithmetic number, because the mean of its divisors is an integer number (10048667631).

Almost surely, 2^20097335261 is an apocalyptic number.

It is an amenable number.

20097335261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20097335261 is an equidigital number, since it uses as much as digits as its factorization.

20097335261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 20097335261 in words is "twenty billion, ninety-seven million, three hundred thirty-five thousand, two hundred sixty-one".