21839842184 has 16 divisors (see below), whose sum is σ = 40973251020. Its totient is φ = 10913641920.

The previous prime is 21839842153. The next prime is 21839842187. The reversal of 21839842184 is 48124893812.

It can be written as a sum of positive squares in 2 ways, for example, as 13789804900 + 8050037284 = 117430^2 + 89722^2 .

It is not an unprimeable number, because it can be changed into a prime (21839842187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770099 + ... + 797954.

Almost surely, 2^21839842184 is an apocalyptic number.

It is an amenable number.

21839842184 is a deficient number, since it is larger than the sum of its proper divisors (19133408836).

21839842184 is a wasteful number, since it uses less digits than its factorization.

21839842184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569800 (or 1569796 counting only the distinct ones).

The product of its digits is 884736, while the sum is 50.

The spelling of 21839842184 in words is "twenty-one billion, eight hundred thirty-nine million, eight hundred forty-two thousand, one hundred eighty-four".