21342341142 has 24 divisors (see below), whose sum is σ = 47836283040. Its totient is φ = 6868799280.

The previous prime is 21342341123. The next prime is 21342341159. The reversal of 21342341142 is 24114324312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20442334 + ... + 20443377.

It is an arithmetic number, because the mean of its divisors is an integer number (1993178460).

Almost surely, 2^21342341142 is an apocalyptic number.

21342341142 is an abundant number, since it is smaller than the sum of its proper divisors (26493941898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21342341142 is a wasteful number, since it uses less digits than its factorization.

21342341142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40885748 (or 40885745 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 21342341142 its reverse (24114324312), we get a palindrome (45456665454).

The spelling of 21342341142 in words is "twenty-one billion, three hundred forty-two million, three hundred forty-one thousand, one hundred forty-two".