21843133642 has 32 divisors (see below), whose sum is σ = 35884062720. Its totient is φ = 9889674480.

The previous prime is 21843133633. The next prime is 21843133643. The reversal of 21843133642 is 24633134812.

It is not an unprimeable number, because it can be changed into a prime (21843133643) 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, 9896103 + ... + 9898309.

It is an arithmetic number, because the mean of its divisors is an integer number (1121376960).

Almost surely, 2^21843133642 is an apocalyptic number.

21843133642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21843133642 is a deficient number, since it is larger than the sum of its proper divisors (14040929078).

21843133642 is a wasteful number, since it uses less digits than its factorization.

21843133642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3786.

The product of its digits is 82944, while the sum is 37.

The spelling of 21843133642 in words is "twenty-one billion, eight hundred forty-three million, one hundred thirty-three thousand, six hundred forty-two".