21983139830 has 32 divisors (see below), whose sum is σ = 40502018304. Its totient is φ = 8586186336.

The previous prime is 21983139809. The next prime is 21983139887. The reversal of 21983139830 is 3893138912.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2103077 + ... + 2113503.

It is an arithmetic number, because the mean of its divisors is an integer number (1265688072).

Almost surely, 2^21983139830 is an apocalyptic number.

21983139830 is a deficient number, since it is larger than the sum of its proper divisors (18518878474).

21983139830 is a wasteful number, since it uses less digits than its factorization.

21983139830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15380.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 21983139830 in words is "twenty-one billion, nine hundred eighty-three million, one hundred thirty-nine thousand, eight hundred thirty".