21402321142 has 16 divisors (see below), whose sum is σ = 32446345680. Its totient is φ = 10586953728.

The previous prime is 21402321119. The next prime is 21402321163. The reversal of 21402321142 is 24112320412.

It is a congruent number.

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, 551398 + ... + 588934.

It is an arithmetic number, because the mean of its divisors is an integer number (2027896605).

Almost surely, 2^21402321142 is an apocalyptic number.

21402321142 is a deficient number, since it is larger than the sum of its proper divisors (11044024538).

21402321142 is a wasteful number, since it uses less digits than its factorization.

21402321142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40575.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21402321142 its reverse (24112320412), we get a palindrome (45514641554).

The spelling of 21402321142 in words is "twenty-one billion, four hundred two million, three hundred twenty-one thousand, one hundred forty-two".