20590905593 has 2 divisors, whose sum is σ = 20590905594. Its totient is φ = 20590905592.

The previous prime is 20590905589. The next prime is 20590905611. The reversal of 20590905593 is 39550909502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20020269049 + 570636544 = 141493^2 + 23888^2 .

It is a cyclic number.

It is not a de Polignac number, because 20590905593 - 2² = 20590905589 is a prime.

It is not a weakly prime, because it can be changed into another prime (20590905493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10295452796 + 10295452797.

It is an arithmetic number, because the mean of its divisors is an integer number (10295452797).

Almost surely, 2^20590905593 is an apocalyptic number.

It is an amenable number.

20590905593 is a deficient number, since it is larger than the sum of its proper divisors (1).

20590905593 is an equidigital number, since it uses as much as digits as its factorization.

20590905593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 546750, while the sum is 47.

The spelling of 20590905593 in words is "twenty billion, five hundred ninety million, nine hundred five thousand, five hundred ninety-three".