21342044133 has 16 divisors (see below), whose sum is σ = 31695164800. Its totient is φ = 14193234720.

The previous prime is 21342044131. The next prime is 21342044173. The reversal of 21342044133 is 33144024312.

21342044133 is a `hidden beast` number, since 213 + 4 + 2 + 0 + 441 + 3 + 3 = 666.

It is not a de Polignac number, because 21342044133 - 2¹ = 21342044131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21342044097 and 21342044106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342044131) 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, 955273 + ... + 977358.

It is an arithmetic number, because the mean of its divisors is an integer number (1980947800).

Almost surely, 2^21342044133 is an apocalyptic number.

It is an amenable number.

21342044133 is a deficient number, since it is larger than the sum of its proper divisors (10353120667).

21342044133 is a wasteful number, since it uses less digits than its factorization.

21342044133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933049 (or 1933043 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21342044133 its reverse (33144024312), we get a palindrome (54486068445).

The spelling of 21342044133 in words is "twenty-one billion, three hundred forty-two million, forty-four thousand, one hundred thirty-three".