21344424142 has 8 divisors (see below), whose sum is σ = 32018439456. Its totient is φ = 10671610992.

The previous prime is 21344424133. The next prime is 21344424163. The reversal of 21344424142 is 24142444312.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254758 + ... + 328009.

It is an arithmetic number, because the mean of its divisors is an integer number (4002304932).

Almost surely, 2^21344424142 is an apocalyptic number.

21344424142 is a deficient number, since it is larger than the sum of its proper divisors (10674015314).

21344424142 is a wasteful number, since it uses less digits than its factorization.

21344424142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601082.

The product of its digits is 24576, while the sum is 31.

Adding to 21344424142 its reverse (24142444312), we get a palindrome (45486868454).

The spelling of 21344424142 in words is "twenty-one billion, three hundred forty-four million, four hundred twenty-four thousand, one hundred forty-two".