21389082206 has 4 divisors (see below), whose sum is σ = 32083623312. Its totient is φ = 10694541102.

The previous prime is 21389082199. The next prime is 21389082227. The reversal of 21389082206 is 60228098312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5347270550 + ... + 5347270553.

It is an arithmetic number, because the mean of its divisors is an integer number (8020905828).

Almost surely, 2^21389082206 is an apocalyptic number.

21389082206 is a deficient number, since it is larger than the sum of its proper divisors (10694541106).

21389082206 is a wasteful number, since it uses less digits than its factorization.

21389082206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10694541105.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 21389082206 in words is "twenty-one billion, three hundred eighty-nine million, eighty-two thousand, two hundred six".