21887184232 has 16 divisors (see below), whose sum is σ = 41053716000. Its totient is φ = 10939526640.

The previous prime is 21887184217. The next prime is 21887184251. The reversal of 21887184232 is 23248178812.

It is a happy 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, 485244 + ... + 528427.

It is an arithmetic number, because the mean of its divisors is an integer number (2565857250).

Almost surely, 2^21887184232 is an apocalyptic number.

It is an amenable number.

21887184232 is a deficient number, since it is larger than the sum of its proper divisors (19166531768).

21887184232 is a wasteful number, since it uses less digits than its factorization.

21887184232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016376 (or 1016372 counting only the distinct ones).

The product of its digits is 344064, while the sum is 46.

The spelling of 21887184232 in words is "twenty-one billion, eight hundred eighty-seven million, one hundred eighty-four thousand, two hundred thirty-two".