21893568832 has 14 divisors (see below), whose sum is σ = 43445050778. Its totient is φ = 10946784384.

The previous prime is 21893568797. The next prime is 21893568839. The reversal of 21893568832 is 23886539812.

It can be written as a sum of positive squares in only one way, i.e., 21766871296 + 126697536 = 147536^2 + 11256^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21893568839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171043443 + ... + 171043570.

Almost surely, 2^21893568832 is an apocalyptic number.

It is an amenable number.

21893568832 is a deficient number, since it is larger than the sum of its proper divisors (21551481946).

21893568832 is an equidigital number, since it uses as much as digits as its factorization.

21893568832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342087025 (or 342087015 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 55.

The spelling of 21893568832 in words is "twenty-one billion, eight hundred ninety-three million, five hundred sixty-eight thousand, eight hundred thirty-two".