21232104340 has 24 divisors (see below), whose sum is σ = 44656788960. Its totient is φ = 8479628448.

The previous prime is 21232104331. The next prime is 21232104353. The reversal of 21232104340 is 4340123212.

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, 812650 + ... + 838369.

It is an arithmetic number, because the mean of its divisors is an integer number (1860699540).

Almost surely, 2^21232104340 is an apocalyptic number.

21232104340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21232104340 is an abundant number, since it is smaller than the sum of its proper divisors (23424684620).

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

21232104340 is a wasteful number, since it uses less digits than its factorization.

21232104340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651671 (or 1651669 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21232104340 its reverse (4340123212), we get a palindrome (25572227552).

The spelling of 21232104340 in words is "twenty-one billion, two hundred thirty-two million, one hundred four thousand, three hundred forty".