21143240032 has 24 divisors (see below), whose sum is σ = 41636394576. Its totient is φ = 10568917632.

The previous prime is 21143240029. The next prime is 21143240087. The reversal of 21143240032 is 23004234112.

It is a super-2 number, since 2×21143240032² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21143239985 and 21143240012.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 45778 + ... + 210670.

It is an arithmetic number, because the mean of its divisors is an integer number (1734849774).

Almost surely, 2^21143240032 is an apocalyptic number.

It is an amenable number.

21143240032 is a deficient number, since it is larger than the sum of its proper divisors (20493154544).

21143240032 is a wasteful number, since it uses less digits than its factorization.

21143240032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168910 (or 168902 counting only the distinct ones).

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

Adding to 21143240032 its reverse (23004234112), we get a palindrome (44147474144).

The spelling of 21143240032 in words is "twenty-one billion, one hundred forty-three million, two hundred forty thousand, thirty-two".