20749632593 has 2 divisors, whose sum is σ = 20749632594. Its totient is φ = 20749632592.

The previous prime is 20749632539. The next prime is 20749632611. The reversal of 20749632593 is 39523694702.

Together with previous prime (20749632539) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10566400849 + 10183231744 = 102793^2 + 100912^2 .

It is a cyclic number.

It is not a de Polignac number, because 20749632593 - 2¹⁰ = 20749631569 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20749631593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10374816296 + 10374816297.

It is an arithmetic number, because the mean of its divisors is an integer number (10374816297).

Almost surely, 2^20749632593 is an apocalyptic number.

It is an amenable number.

20749632593 is a deficient number, since it is larger than the sum of its proper divisors (1).

20749632593 is an equidigital number, since it uses as much as digits as its factorization.

20749632593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 50.

The spelling of 20749632593 in words is "twenty billion, seven hundred forty-nine million, six hundred thirty-two thousand, five hundred ninety-three".