21331000342 has 16 divisors (see below), whose sum is σ = 33955843680. Its totient is φ = 10015244928.

The previous prime is 21331000333. The next prime is 21331000403. The reversal of 21331000342 is 24300013312.

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, 699633 + ... + 729484.

It is an arithmetic number, because the mean of its divisors is an integer number (2122240230).

Almost surely, 2^21331000342 is an apocalyptic number.

21331000342 is a deficient number, since it is larger than the sum of its proper divisors (12624843338).

21331000342 is a wasteful number, since it uses less digits than its factorization.

21331000342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429575.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21331000342 its reverse (24300013312), we get a palindrome (45631013654).

The spelling of 21331000342 in words is "twenty-one billion, three hundred thirty-one million, three hundred forty-two", and thus it is an aban number.