21230381605938 has 32 divisors (see below), whose sum is σ = 42538304445696. Its totient is φ = 7063872611328.

The previous prime is 21230381605921. The next prime is 21230381605943. The reversal of 21230381605938 is 83950618303212.

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, 37709095 + ... + 38267957.

It is an arithmetic number, because the mean of its divisors is an integer number (1329322013928).

Almost surely, 2^{21230381605938} is an apocalyptic number.

21230381605938 is an abundant number, since it is smaller than the sum of its proper divisors (21307922839758).

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

21230381605938 is a wasteful number, since it uses less digits than its factorization.

21230381605938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570418.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 21230381605938 in words is "twenty-one trillion, two hundred thirty billion, three hundred eighty-one million, six hundred five thousand, nine hundred thirty-eight".