20293738397 has 2 divisors, whose sum is σ = 20293738398. Its totient is φ = 20293738396.

The previous prime is 20293738391. The next prime is 20293738411. The reversal of 20293738397 is 79383739202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10591291396 + 9702447001 = 102914^2 + 98501^2 .

It is a cyclic number.

It is not a de Polignac number, because 20293738397 - 2²⁴ = 20276961181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20293738391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10146869198 + 10146869199.

It is an arithmetic number, because the mean of its divisors is an integer number (10146869199).

Almost surely, 2^20293738397 is an apocalyptic number.

It is an amenable number.

20293738397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20293738397 is an equidigital number, since it uses as much as digits as its factorization.

20293738397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3429216, while the sum is 53.

The spelling of 20293738397 in words is "twenty billion, two hundred ninety-three million, seven hundred thirty-eight thousand, three hundred ninety-seven".