21364766526733 has 8 divisors (see below), whose sum is σ = 24419060684352. Its totient is φ = 18311018532576.

The previous prime is 21364766526689. The next prime is 21364766526769. The reversal of 21364766526733 is 33762566746312.

It is a happy number.

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

It is not a de Polignac number, because 21364766526733 - 2²¹ = 21364764429581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364766226733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136457035 + ... + 136613512.

It is an arithmetic number, because the mean of its divisors is an integer number (3052382585544).

Almost surely, 2^{21364766526733} is an apocalyptic number.

It is an amenable number.

21364766526733 is a deficient number, since it is larger than the sum of its proper divisors (3054294157619).

21364766526733 is a wasteful number, since it uses less digits than its factorization.

21364766526733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273081731.

The product of its digits is 137168640, while the sum is 61.

The spelling of 21364766526733 in words is "twenty-one trillion, three hundred sixty-four billion, seven hundred sixty-six million, five hundred twenty-six thousand, seven hundred thirty-three".