21198782683 has 8 divisors (see below), whose sum is σ = 22842966608. Its totient is φ = 19556528544.

The previous prime is 21198782677. The next prime is 21198782719. The reversal of 21198782683 is 38628789112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21198782683 - 2²⁵ = 21165228251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21198782653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459585 + ... + 503602.

It is an arithmetic number, because the mean of its divisors is an integer number (2855370826).

Almost surely, 2^21198782683 is an apocalyptic number.

21198782683 is a deficient number, since it is larger than the sum of its proper divisors (1644183925).

21198782683 is a wasteful number, since it uses less digits than its factorization.

21198782683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964893.

The product of its digits is 2322432, while the sum is 55.

The spelling of 21198782683 in words is "twenty-one billion, one hundred ninety-eight million, seven hundred eighty-two thousand, six hundred eighty-three".