21203324140 has 48 divisors (see below), whose sum is σ = 44928374400. Its totient is φ = 8405160192.

The previous prime is 21203324083. The next prime is 21203324141. The reversal of 21203324140 is 4142330212.

It is not an unprimeable number, because it can be changed into a prime (21203324141) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1212781 + ... + 1230139.

It is an arithmetic number, because the mean of its divisors is an integer number (936007800).

Almost surely, 2^21203324140 is an apocalyptic number.

21203324140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203324140 is an abundant number, since it is smaller than the sum of its proper divisors (23725050260).

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

21203324140 is a wasteful number, since it uses less digits than its factorization.

21203324140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17914 (or 17912 counting only the distinct ones).

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

Adding to 21203324140 its reverse (4142330212), we get a palindrome (25345654352).

The spelling of 21203324140 in words is "twenty-one billion, two hundred three million, three hundred twenty-four thousand, one hundred forty".