21312010342 has 16 divisors (see below), whose sum is σ = 36536758272. Its totient is φ = 9133247880.

The previous prime is 21312010337. The next prime is 21312010367. The reversal of 21312010342 is 24301021312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469467 + ... + 512857.

It is an arithmetic number, because the mean of its divisors is an integer number (2283547392).

Almost surely, 2^21312010342 is an apocalyptic number.

21312010342 is a deficient number, since it is larger than the sum of its proper divisors (15224747930).

21312010342 is a wasteful number, since it uses less digits than its factorization.

21312010342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78483.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21312010342 its reverse (24301021312), we get a palindrome (45613031654).

The spelling of 21312010342 in words is "twenty-one billion, three hundred twelve million, ten thousand, three hundred forty-two".