21343004232 has 64 divisors (see below), whose sum is σ = 58221495360. Its totient is φ = 6466099200.

The previous prime is 21343004191. The next prime is 21343004237. The reversal of 21343004232 is 23240034312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21343004237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1874268 + ... + 1885620.

It is an arithmetic number, because the mean of its divisors is an integer number (909710865).

Almost surely, 2^21343004232 is an apocalyptic number.

21343004232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21343004232 is an abundant number, since it is smaller than the sum of its proper divisors (36878491128).

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

21343004232 is a wasteful number, since it uses less digits than its factorization.

21343004232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18494 (or 18490 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21343004232 its reverse (23240034312), we get a palindrome (44583038544).

The spelling of 21343004232 in words is "twenty-one billion, three hundred forty-three million, four thousand, two hundred thirty-two".