20007864593 has 2 divisors, whose sum is σ = 20007864594. Its totient is φ = 20007864592.

The previous prime is 20007864581. The next prime is 20007864629. The reversal of 20007864593 is 39546870002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18815060224 + 1192804369 = 137168^2 + 34537^2 .

It is a cyclic number.

It is not a de Polignac number, because 20007864593 - 2⁸ = 20007864337 is a prime.

It is not a weakly prime, because it can be changed into another prime (20007864533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10003932296 + 10003932297.

It is an arithmetic number, because the mean of its divisors is an integer number (10003932297).

Almost surely, 2^20007864593 is an apocalyptic number.

It is an amenable number.

20007864593 is a deficient number, since it is larger than the sum of its proper divisors (1).

20007864593 is an equidigital number, since it uses as much as digits as its factorization.

20007864593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 20007864593 in words is "twenty billion, seven million, eight hundred sixty-four thousand, five hundred ninety-three".