21893940832 has 12 divisors (see below), whose sum is σ = 43103696076. Its totient is φ = 10946970400.

The previous prime is 21893940829. The next prime is 21893940853. The reversal of 21893940832 is 23804939812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342092794 + ... + 342092857.

It is an arithmetic number, because the mean of its divisors is an integer number (3591974673).

Almost surely, 2^21893940832 is an apocalyptic number.

It is an amenable number.

21893940832 is a deficient number, since it is larger than the sum of its proper divisors (21209755244).

21893940832 is an equidigital number, since it uses as much as digits as its factorization.

21893940832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684185661 (or 684185653 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 21893940832 in words is "twenty-one billion, eight hundred ninety-three million, nine hundred forty thousand, eight hundred thirty-two".