21324003140 has 48 divisors (see below), whose sum is σ = 48863727360. Its totient is φ = 7752218880.

The previous prime is 21324003131. The next prime is 21324003223. The reversal of 21324003140 is 4130042312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1077656 + ... + 1097264.

It is an arithmetic number, because the mean of its divisors is an integer number (1017994320).

Almost surely, 2^21324003140 is an apocalyptic number.

21324003140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21324003140 is an abundant number, since it is smaller than the sum of its proper divisors (27539724220).

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

21324003140 is a wasteful number, since it uses less digits than its factorization.

21324003140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24572 (or 24570 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21324003140 its reverse (4130042312), we get a palindrome (25454045452).

The spelling of 21324003140 in words is "twenty-one billion, three hundred twenty-four million, three thousand, one hundred forty".