21233134139 has 4 divisors (see below), whose sum is σ = 24266439024. Its totient is φ = 18199829256.

The previous prime is 21233134061. The next prime is 21233134183. The reversal of 21233134139 is 93143133212.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-21233134139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233134199) 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, 1516652432 + ... + 1516652445.

It is an arithmetic number, because the mean of its divisors is an integer number (6066609756).

Almost surely, 2^21233134139 is an apocalyptic number.

21233134139 is a deficient number, since it is larger than the sum of its proper divisors (3033304885).

21233134139 is an equidigital number, since it uses as much as digits as its factorization.

21233134139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033304884.

The product of its digits is 11664, while the sum is 32.

The spelling of 21233134139 in words is "twenty-one billion, two hundred thirty-three million, one hundred thirty-four thousand, one hundred thirty-nine".