21266833366 has 8 divisors (see below), whose sum is σ = 33776735400. Its totient is φ = 10007921568.

The previous prime is 21266833363. The next prime is 21266833391. The reversal of 21266833366 is 66333866212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21266833363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312747516 + ... + 312747583.

It is an arithmetic number, because the mean of its divisors is an integer number (4222091925).

Almost surely, 2^21266833366 is an apocalyptic number.

21266833366 is a deficient number, since it is larger than the sum of its proper divisors (12509902034).

21266833366 is a wasteful number, since it uses less digits than its factorization.

21266833366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625495118.

The product of its digits is 1119744, while the sum is 46.

The spelling of 21266833366 in words is "twenty-one billion, two hundred sixty-six million, eight hundred thirty-three thousand, three hundred sixty-six".