21936144383 has 4 divisors (see below), whose sum is σ = 21936823008. Its totient is φ = 21935465760.

The previous prime is 21936144371. The next prime is 21936144403. The reversal of 21936144383 is 38344163912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21936144383 - 2⁴ = 21936144367 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 (21936144343) 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, 288266 + ... + 356327.

It is an arithmetic number, because the mean of its divisors is an integer number (5484205752).

Almost surely, 2^21936144383 is an apocalyptic number.

21936144383 is a deficient number, since it is larger than the sum of its proper divisors (678625).

21936144383 is an equidigital number, since it uses as much as digits as its factorization.

21936144383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678624.

The product of its digits is 373248, while the sum is 44.

The spelling of 21936144383 in words is "twenty-one billion, nine hundred thirty-six million, one hundred forty-four thousand, three hundred eighty-three".