21083399786 has 8 divisors (see below), whose sum is σ = 31774982304. Its totient is φ = 10491739020.

The previous prime is 21083399693. The next prime is 21083399797. The reversal of 21083399786 is 68799338012.

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

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, 24979910 + ... + 24980753.

It is an arithmetic number, because the mean of its divisors is an integer number (3971872788).

Almost surely, 2^21083399786 is an apocalyptic number.

21083399786 is a deficient number, since it is larger than the sum of its proper divisors (10691582518).

21083399786 is a wasteful number, since it uses less digits than its factorization.

21083399786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49960876.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 21083399786 in words is "twenty-one billion, eighty-three million, three hundred ninety-nine thousand, seven hundred eighty-six".