21833338383978 has 32 divisors (see below), whose sum is σ = 48923844246720. Its totient is φ = 6437347925760.

The previous prime is 21833338383947. The next prime is 21833338384003. The reversal of 21833338383978 is 87938383333812.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4470378063 + ... + 4470382946.

It is an arithmetic number, because the mean of its divisors is an integer number (1528870132710).

Almost surely, 2^{21833338383978} is an apocalyptic number.

21833338383978 is an abundant number, since it is smaller than the sum of its proper divisors (27090505862742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21833338383978 is a wasteful number, since it uses less digits than its factorization.

21833338383978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8940761062.

The product of its digits is 376233984, while the sum is 69.

The spelling of 21833338383978 in words is "twenty-one trillion, eight hundred thirty-three billion, three hundred thirty-eight million, three hundred eighty-three thousand, nine hundred seventy-eight".