21208226038 has 8 divisors (see below), whose sum is σ = 31813349760. Its totient is φ = 10603776120.

The previous prime is 21208226027. The next prime is 21208226047. The reversal of 21208226038 is 83062280212.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21208225994 and 21208226012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80598 + ... + 221161.

It is an arithmetic number, because the mean of its divisors is an integer number (3976668720).

Almost surely, 2^21208226038 is an apocalyptic number.

21208226038 is a deficient number, since it is larger than the sum of its proper divisors (10605123722).

21208226038 is a wasteful number, since it uses less digits than its factorization.

21208226038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336902.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 21208226038 in words is "twenty-one billion, two hundred eight million, two hundred twenty-six thousand, thirty-eight".