20023565893 has 2 divisors, whose sum is σ = 20023565894. Its totient is φ = 20023565892.

The previous prime is 20023565873. The next prime is 20023565917. The reversal of 20023565893 is 39856532002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17747035524 + 2276530369 = 133218^2 + 47713^2 .

It is a cyclic number.

It is not a de Polignac number, because 20023565893 - 2³³ = 11433631301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20023565843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011782946 + 10011782947.

It is an arithmetic number, because the mean of its divisors is an integer number (10011782947).

Almost surely, 2^20023565893 is an apocalyptic number.

It is an amenable number.

20023565893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023565893 is an equidigital number, since it uses as much as digits as its factorization.

20023565893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 20023565893 in words is "twenty billion, twenty-three million, five hundred sixty-five thousand, eight hundred ninety-three".