21232345142 has 8 divisors (see below), whose sum is σ = 32709288576. Its totient is φ = 10329248952.

The previous prime is 21232345111. The next prime is 21232345151. The reversal of 21232345142 is 24154323212.

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

It is a super-2 number, since 2×21232345142² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143461718 + ... + 143461865.

It is an arithmetic number, because the mean of its divisors is an integer number (4088661072).

Almost surely, 2^21232345142 is an apocalyptic number.

21232345142 is a deficient number, since it is larger than the sum of its proper divisors (11476943434).

21232345142 is a wasteful number, since it uses less digits than its factorization.

21232345142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286923622.

The product of its digits is 11520, while the sum is 29.

Adding to 21232345142 its reverse (24154323212), we get a palindrome (45386668354).

The spelling of 21232345142 in words is "twenty-one billion, two hundred thirty-two million, three hundred forty-five thousand, one hundred forty-two".