20326415693 has 2 divisors, whose sum is σ = 20326415694. Its totient is φ = 20326415692.

The previous prime is 20326415657. The next prime is 20326415701. The reversal of 20326415693 is 39651462302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13914089764 + 6412325929 = 117958^2 + 80077^2 .

It is a cyclic number.

It is not a de Polignac number, because 20326415693 - 2²⁴ = 20309638477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20326415693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20326415093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10163207846 + 10163207847.

It is an arithmetic number, because the mean of its divisors is an integer number (10163207847).

Almost surely, 2^20326415693 is an apocalyptic number.

It is an amenable number.

20326415693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20326415693 is an equidigital number, since it uses as much as digits as its factorization.

20326415693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

Adding to 20326415693 its reverse (39651462302), we get a palindrome (59977877995).

The spelling of 20326415693 in words is "twenty billion, three hundred twenty-six million, four hundred fifteen thousand, six hundred ninety-three".