20363277397 has 2 divisors, whose sum is σ = 20363277398. Its totient is φ = 20363277396.

The previous prime is 20363277349. The next prime is 20363277419. The reversal of 20363277397 is 79377236302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16981738596 + 3381538801 = 130314^2 + 58151^2 .

It is a cyclic number.

It is not a de Polignac number, because 20363277397 - 2³¹ = 18215793749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20363277397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20363227397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10181638698 + 10181638699.

It is an arithmetic number, because the mean of its divisors is an integer number (10181638699).

Almost surely, 2^20363277397 is an apocalyptic number.

It is an amenable number.

20363277397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20363277397 is an equidigital number, since it uses as much as digits as its factorization.

20363277397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000376, while the sum is 49.

The spelling of 20363277397 in words is "twenty billion, three hundred sixty-three million, two hundred seventy-seven thousand, three hundred ninety-seven".