21342032320 has 84 divisors (see below), whose sum is σ = 59118017400. Its totient is φ = 7317262848.

The previous prime is 21342032317. The next prime is 21342032347. The reversal of 21342032320 is 2323024312.

It is a junction number, because it is equal to n+sod(n) for n = 21342032291 and 21342032300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 664870 + ... + 696229.

Almost surely, 2^21342032320 is an apocalyptic number.

21342032320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21342032320 is an abundant number, since it is smaller than the sum of its proper divisors (37775985080).

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

21342032320 is a wasteful number, since it uses less digits than its factorization.

21342032320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361130 (or 1361113 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21342032320 its reverse (2323024312), we get a palindrome (23665056632).

The spelling of 21342032320 in words is "twenty-one billion, three hundred forty-two million, thirty-two thousand, three hundred twenty".