20597735243 has 2 divisors, whose sum is σ = 20597735244. Its totient is φ = 20597735242.

The previous prime is 20597735233. The next prime is 20597735297. The reversal of 20597735243 is 34253779502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20597735243 - 2¹⁰ = 20597734219 is a prime.

It is not a weakly prime, because it can be changed into another prime (20597735233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10298867621 + 10298867622.

It is an arithmetic number, because the mean of its divisors is an integer number (10298867622).

Almost surely, 2^20597735243 is an apocalyptic number.

20597735243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20597735243 is an equidigital number, since it uses as much as digits as its factorization.

20597735243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1587600, while the sum is 47.

The spelling of 20597735243 in words is "twenty billion, five hundred ninety-seven million, seven hundred thirty-five thousand, two hundred forty-three".