21342344142 has 32 divisors (see below), whose sum is σ = 49035278592. Its totient is φ = 6066215424.

The previous prime is 21342344137. The next prime is 21342344143. The reversal of 21342344142 is 24144324312.

It is a super-3 number, since 3×21342344142³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342344143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1308348 + ... + 1324559.

It is an arithmetic number, because the mean of its divisors is an integer number (1532352456).

Almost surely, 2^21342344142 is an apocalyptic number.

21342344142 is an abundant number, since it is smaller than the sum of its proper divisors (27692934450).

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

21342344142 is a wasteful number, since it uses less digits than its factorization.

21342344142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633112.

The product of its digits is 18432, while the sum is 30.

Adding to 21342344142 its reverse (24144324312), we get a palindrome (45486668454).

The spelling of 21342344142 in words is "twenty-one billion, three hundred forty-two million, three hundred forty-four thousand, one hundred forty-two".