21442303142 has 8 divisors (see below), whose sum is σ = 34637566656. Its totient is φ = 9896447592.

The previous prime is 21442303117. The next prime is 21442303151. The reversal of 21442303142 is 24130324412.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 824703967 = 21442303142 / (2 + 1 + 4 + 4 + 2 + 3 + 0 + 3 + 1 + 4 + 2).

It is a congruent number.

It is an unprimeable number.

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, 412351958 + ... + 412352009.

It is an arithmetic number, because the mean of its divisors is an integer number (4329695832).

Almost surely, 2^21442303142 is an apocalyptic number.

21442303142 is a deficient number, since it is larger than the sum of its proper divisors (13195263514).

21442303142 is a wasteful number, since it uses less digits than its factorization.

21442303142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824703982.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21442303142 its reverse (24130324412), we get a palindrome (45572627554).

The spelling of 21442303142 in words is "twenty-one billion, four hundred forty-two million, three hundred three thousand, one hundred forty-two".