20133847889 has 4 divisors (see below), whose sum is σ = 20135982756. Its totient is φ = 20131713024.

The previous prime is 20133847873. The next prime is 20133847957. The reversal of 20133847889 is 98874833102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98874833102 = 2 ⋅49437416551.

It can be written as a sum of positive squares in 2 ways, for example, as 11649964225 + 8483883664 = 107935^2 + 92108^2 .

It is a cyclic number.

It is not a de Polignac number, because 20133847889 - 2⁴ = 20133847873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20133847889.

It is not an unprimeable number, because it can be changed into a prime (20133847829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053224 + ... + 1072169.

It is an arithmetic number, because the mean of its divisors is an integer number (5033995689).

Almost surely, 2^20133847889 is an apocalyptic number.

It is an amenable number.

20133847889 is a deficient number, since it is larger than the sum of its proper divisors (2134867).

20133847889 is an equidigital number, since it uses as much as digits as its factorization.

20133847889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134866.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 20133847889 in words is "twenty billion, one hundred thirty-three million, eight hundred forty-seven thousand, eight hundred eighty-nine".