21441342143442 has 16 divisors (see below), whose sum is σ = 46181352309120. Its totient is φ = 6597336044112.

The previous prime is 21441342143401. The next prime is 21441342143453. The reversal of 21441342143442 is 24434124314412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 21441342143442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137444500842 + ... + 137444500997.

It is an arithmetic number, because the mean of its divisors is an integer number (2886334519320).

Almost surely, 2^{21441342143442} is an apocalyptic number.

21441342143442 is an abundant number, since it is smaller than the sum of its proper divisors (24740010165678).

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

21441342143442 is a wasteful number, since it uses less digits than its factorization.

21441342143442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274889001857.

The product of its digits is 294912, while the sum is 39.

Adding to 21441342143442 its reverse (24434124314412), we get a palindrome (45875466457854).

The spelling of 21441342143442 in words is "twenty-one trillion, four hundred forty-one billion, three hundred forty-two million, one hundred forty-three thousand, four hundred forty-two".