21384827349 has 8 divisors (see below), whose sum is σ = 28789929792. Its totient is φ = 14118138240.

The previous prime is 21384827341. The next prime is 21384827383. The reversal of 21384827349 is 94372848312.

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

It is not a de Polignac number, because 21384827349 - 2³ = 21384827341 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21384827341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34602972 + ... + 34603589.

It is an arithmetic number, because the mean of its divisors is an integer number (3598741224).

Almost surely, 2^21384827349 is an apocalyptic number.

It is an amenable number.

21384827349 is a deficient number, since it is larger than the sum of its proper divisors (7405102443).

21384827349 is a wasteful number, since it uses less digits than its factorization.

21384827349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69206667.

The product of its digits is 2322432, while the sum is 51.

The spelling of 21384827349 in words is "twenty-one billion, three hundred eighty-four million, eight hundred twenty-seven thousand, three hundred forty-nine".