20383155889 has 2 divisors, whose sum is σ = 20383155890. Its totient is φ = 20383155888.

The previous prime is 20383155827. The next prime is 20383155899. The reversal of 20383155889 is 98855138302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20382416289 + 739600 = 142767^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 20383155889 - 2¹¹ = 20383153841 is a prime.

It is not a weakly prime, because it can be changed into another prime (20383155809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10191577944 + 10191577945.

It is an arithmetic number, because the mean of its divisors is an integer number (10191577945).

Almost surely, 2^20383155889 is an apocalyptic number.

It is an amenable number.

20383155889 is a deficient number, since it is larger than the sum of its proper divisors (1).

20383155889 is an equidigital number, since it uses as much as digits as its factorization.

20383155889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 20383155889 in words is "twenty billion, three hundred eighty-three million, one hundred fifty-five thousand, eight hundred eighty-nine".