20341439889 has 4 divisors (see below), whose sum is σ = 27121919856. Its totient is φ = 13560959924.

The previous prime is 20341439819. The next prime is 20341439897. The reversal of 20341439889 is 98893414302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20341439889 - 2⁷ = 20341439761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20341439819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3390239979 + ... + 3390239984.

It is an arithmetic number, because the mean of its divisors is an integer number (6780479964).

Almost surely, 2^20341439889 is an apocalyptic number.

It is an amenable number.

20341439889 is a deficient number, since it is larger than the sum of its proper divisors (6780479967).

20341439889 is an equidigital number, since it uses as much as digits as its factorization.

20341439889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780479966.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 20341439889 in words is "twenty billion, three hundred forty-one million, four hundred thirty-nine thousand, eight hundred eighty-nine".