21884638342 has 8 divisors (see below), whose sum is σ = 37516522896. Its totient is φ = 9379130712.

The previous prime is 21884638337. The next prime is 21884638379. The reversal of 21884638342 is 24383648812.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781594213 + ... + 781594240.

It is an arithmetic number, because the mean of its divisors is an integer number (4689565362).

Almost surely, 2^21884638342 is an apocalyptic number.

21884638342 is a deficient number, since it is larger than the sum of its proper divisors (15631884554).

21884638342 is a wasteful number, since it uses less digits than its factorization.

21884638342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563188462.

The product of its digits is 1769472, while the sum is 49.

The spelling of 21884638342 in words is "twenty-one billion, eight hundred eighty-four million, six hundred thirty-eight thousand, three hundred forty-two".