21326266046 has 16 divisors (see below), whose sum is σ = 34963747200. Its totient is φ = 9712151040.

The previous prime is 21326266043. The next prime is 21326266051. The reversal of 21326266046 is 64066262312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21326266043) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 10115771 + ... + 10117878.

It is an arithmetic number, because the mean of its divisors is an integer number (2185234200).

Almost surely, 2^21326266046 is an apocalyptic number.

21326266046 is a deficient number, since it is larger than the sum of its proper divisors (13637481154).

21326266046 is a wasteful number, since it uses less digits than its factorization.

21326266046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20233699.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 21326266046 in words is "twenty-one billion, three hundred twenty-six million, two hundred sixty-six thousand, forty-six".