20269567693 has 2 divisors, whose sum is σ = 20269567694. Its totient is φ = 20269567692.

The previous prime is 20269567679. The next prime is 20269567709. The reversal of 20269567693 is 39676596202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17084319849 + 3185247844 = 130707^2 + 56438^2 .

It is a cyclic number.

It is not a de Polignac number, because 20269567693 - 2¹³ = 20269559501 is a prime.

It is a super-2 number, since 2×20269567693² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20269567793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10134783846 + 10134783847.

It is an arithmetic number, because the mean of its divisors is an integer number (10134783847).

Almost surely, 2^20269567693 is an apocalyptic number.

It is an amenable number.

20269567693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20269567693 is an equidigital number, since it uses as much as digits as its factorization.

20269567693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 55.

The spelling of 20269567693 in words is "twenty billion, two hundred sixty-nine million, five hundred sixty-seven thousand, six hundred ninety-three".