21442432334 has 8 divisors (see below), whose sum is σ = 32525038080. Its totient is φ = 10600752976.

The previous prime is 21442432327. The next prime is 21442432339. The reversal of 21442432334 is 43323424412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21442432334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442432339) 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, 60231374 + ... + 60231729.

It is an arithmetic number, because the mean of its divisors is an integer number (4065629760).

Almost surely, 2^21442432334 is an apocalyptic number.

21442432334 is a deficient number, since it is larger than the sum of its proper divisors (11082605746).

21442432334 is a wasteful number, since it uses less digits than its factorization.

21442432334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120463194.

The product of its digits is 55296, while the sum is 32.

Adding to 21442432334 its reverse (43323424412), we get a palindrome (64765856746).

The spelling of 21442432334 in words is "twenty-one billion, four hundred forty-two million, four hundred thirty-two thousand, three hundred thirty-four".