20530934399 has 2 divisors, whose sum is σ = 20530934400. Its totient is φ = 20530934398.

The previous prime is 20530934371. The next prime is 20530934407. The reversal of 20530934399 is 99343903502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20530934399 - 2⁸ = 20530934143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20530934309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10265467199 + 10265467200.

It is an arithmetic number, because the mean of its divisors is an integer number (10265467200).

Almost surely, 2^20530934399 is an apocalyptic number.

20530934399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20530934399 is an equidigital number, since it uses as much as digits as its factorization.

20530934399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 47.

The spelling of 20530934399 in words is "twenty billion, five hundred thirty million, nine hundred thirty-four thousand, three hundred ninety-nine".