20195306697 has 4 divisors (see below), whose sum is σ = 26927075600. Its totient is φ = 13463537796.

The previous prime is 20195306671. The next prime is 20195306753. The reversal of 20195306697 is 79660359102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20195306697 - 2⁷ = 20195306569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20195306617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3365884447 + ... + 3365884452.

It is an arithmetic number, because the mean of its divisors is an integer number (6731768900).

Almost surely, 2^20195306697 is an apocalyptic number.

It is an amenable number.

20195306697 is a deficient number, since it is larger than the sum of its proper divisors (6731768903).

20195306697 is an equidigital number, since it uses as much as digits as its factorization.

20195306697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6731768902.

The product of its (nonzero) digits is 612360, while the sum is 48.

The spelling of 20195306697 in words is "twenty billion, one hundred ninety-five million, three hundred six thousand, six hundred ninety-seven".