21143214342 has 24 divisors (see below), whose sum is σ = 45819678216. Its totient is φ = 7046294976.

The previous prime is 21143214341. The next prime is 21143214343. The reversal of 21143214342 is 24341234112.

21143214342 is a `hidden beast` number, since 211 + 432 + 14 + 3 + 4 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (21143214341) and next prime (21143214343).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143214341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28003 + ... + 207534.

It is an arithmetic number, because the mean of its divisors is an integer number (1909153259).

Almost surely, 2^21143214342 is an apocalyptic number.

21143214342 is an abundant number, since it is smaller than the sum of its proper divisors (24676463874).

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

21143214342 is a wasteful number, since it uses less digits than its factorization.

21143214342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240532 (or 240529 counting only the distinct ones).

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

Adding to 21143214342 its reverse (24341234112), we get a palindrome (45484448454).

The spelling of 21143214342 in words is "twenty-one billion, one hundred forty-three million, two hundred fourteen thousand, three hundred forty-two".