21766373373 has 16 divisors (see below), whose sum is σ = 29593758656. Its totient is φ = 14226503040.

The previous prime is 21766373359. The next prime is 21766373399. The reversal of 21766373373 is 37337366712.

It is not a de Polignac number, because 21766373373 - 2⁶ = 21766373309 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21766373333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137536 + ... + 249897.

It is an arithmetic number, because the mean of its divisors is an integer number (1849609916).

Almost surely, 2^21766373373 is an apocalyptic number.

It is an amenable number.

21766373373 is a deficient number, since it is larger than the sum of its proper divisors (7827385283).

21766373373 is a wasteful number, since it uses less digits than its factorization.

21766373373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387804.

The product of its digits is 2000376, while the sum is 48.

The spelling of 21766373373 in words is "twenty-one billion, seven hundred sixty-six million, three hundred seventy-three thousand, three hundred seventy-three".