21339648427 has 8 divisors (see below), whose sum is σ = 21517401600. Its totient is φ = 21162546024.

The previous prime is 21339648413. The next prime is 21339648461. The reversal of 21339648427 is 72484693312.

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

It is a cyclic number.

It is not a de Polignac number, because 21339648427 - 2²³ = 21331259819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21339642427) 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, 96727 + ... + 228112.

It is an arithmetic number, because the mean of its divisors is an integer number (2689675200).

Almost surely, 2^21339648427 is an apocalyptic number.

21339648427 is a deficient number, since it is larger than the sum of its proper divisors (177753173).

21339648427 is a wasteful number, since it uses less digits than its factorization.

21339648427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325385.

The product of its digits is 1741824, while the sum is 49.

The spelling of 21339648427 in words is "twenty-one billion, three hundred thirty-nine million, six hundred forty-eight thousand, four hundred twenty-seven".