21723406383 has 16 divisors (see below), whose sum is σ = 33111626240. Its totient is φ = 12409890336.

The previous prime is 21723406373. The next prime is 21723406387. The reversal of 21723406383 is 38360432712.

It is not a de Polignac number, because 21723406383 - 2⁵ = 21723406351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21723406387) 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, 67648 + ... + 219141.

It is an arithmetic number, because the mean of its divisors is an integer number (2069476640).

Almost surely, 2^21723406383 is an apocalyptic number.

21723406383 is a deficient number, since it is larger than the sum of its proper divisors (11388219857).

21723406383 is a wasteful number, since it uses less digits than its factorization.

21723406383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290406.

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 21723406383 in words is "twenty-one billion, seven hundred twenty-three million, four hundred six thousand, three hundred eighty-three".