21322104240 has 80 divisors (see below), whose sum is σ = 66113777376. Its totient is φ = 5684582400.

The previous prime is 21322104239. The next prime is 21322104269. The reversal of 21322104240 is 4240122312.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1485900 + ... + 1500180.

Almost surely, 2^21322104240 is an apocalyptic number.

21322104240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322104240 is an abundant number, since it is smaller than the sum of its proper divisors (44791673136).

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

21322104240 is a wasteful number, since it uses less digits than its factorization.

21322104240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20518 (or 20512 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21322104240 its reverse (4240122312), we get a palindrome (25562226552).

The spelling of 21322104240 in words is "twenty-one billion, three hundred twenty-two million, one hundred four thousand, two hundred forty".