21193327516 has 6 divisors (see below), whose sum is σ = 37088323160. Its totient is φ = 10596663756.

The previous prime is 21193327501. The next prime is 21193327517. The reversal of 21193327516 is 61572339112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21193327517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2649165936 + ... + 2649165943.

Almost surely, 2^21193327516 is an apocalyptic number.

It is an amenable number.

21193327516 is a deficient number, since it is larger than the sum of its proper divisors (15894995644).

21193327516 is a wasteful number, since it uses less digits than its factorization.

21193327516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5298331883 (or 5298331881 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The spelling of 21193327516 in words is "twenty-one billion, one hundred ninety-three million, three hundred twenty-seven thousand, five hundred sixteen".