21827184342 has 8 divisors (see below), whose sum is σ = 43654368696. Its totient is φ = 7275728112.

The previous prime is 21827184331. The next prime is 21827184347. The reversal of 21827184342 is 24348172812.

It is a sphenic number, since it is the product of 3 distinct primes.

21827184342 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21827184294 and 21827184303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21827184347) 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, 1818932023 + ... + 1818932034.

It is an arithmetic number, because the mean of its divisors is an integer number (5456796087).

Almost surely, 2^21827184342 is an apocalyptic number.

21827184342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21827184342 is a wasteful number, since it uses less digits than its factorization.

21827184342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3637864062.

The product of its digits is 172032, while the sum is 42.

The spelling of 21827184342 in words is "twenty-one billion, eight hundred twenty-seven million, one hundred eighty-four thousand, three hundred forty-two".