21142332334 has 4 divisors (see below), whose sum is σ = 31713498504. Its totient is φ = 10571166166.

The previous prime is 21142332331. The next prime is 21142332349. The reversal of 21142332334 is 43323324112.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142332331) 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 as a sum of consecutive naturals, namely, 5285583082 + ... + 5285583085.

It is an arithmetic number, because the mean of its divisors is an integer number (7928374626).

Almost surely, 2^21142332334 is an apocalyptic number.

21142332334 is a deficient number, since it is larger than the sum of its proper divisors (10571166170).

21142332334 is a wasteful number, since it uses less digits than its factorization.

21142332334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10571166169.

The product of its digits is 10368, while the sum is 28.

Adding to 21142332334 its reverse (43323324112), we get a palindrome (64465656446).

The spelling of 21142332334 in words is "twenty-one billion, one hundred forty-two million, three hundred thirty-two thousand, three hundred thirty-four".