20050737472397 has 2 divisors, whose sum is σ = 20050737472398. Its totient is φ = 20050737472396.

The previous prime is 20050737472391. The next prime is 20050737472433. The reversal of 20050737472397 is 79327473705002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18718031156356 + 1332706316041 = 4326434^2 + 1154429^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20050737472397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20050737472391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025368736198 + 10025368736199.

It is an arithmetic number, because the mean of its divisors is an integer number (10025368736199).

Almost surely, 2^{20050737472397} is an apocalyptic number.

It is an amenable number.

20050737472397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20050737472397 is an equidigital number, since it uses as much as digits as its factorization.

20050737472397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15558480, while the sum is 56.

The spelling of 20050737472397 in words is "twenty trillion, fifty billion, seven hundred thirty-seven million, four hundred seventy-two thousand, three hundred ninety-seven".