21176942739 has 8 divisors (see below), whose sum is σ = 28261206480. Its totient is φ = 14105320416.

The previous prime is 21176942719. The next prime is 21176942741. The reversal of 21176942739 is 93724967112.

It is a happy number.

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

It is not a de Polignac number, because 21176942739 - 2¹¹ = 21176940691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21176942691 and 21176942700.

It is not an unprimeable number, because it can be changed into a prime (21176942719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3156444 + ... + 3163145.

It is an arithmetic number, because the mean of its divisors is an integer number (3532650810).

Almost surely, 2^21176942739 is an apocalyptic number.

21176942739 is a deficient number, since it is larger than the sum of its proper divisors (7084263741).

21176942739 is a wasteful number, since it uses less digits than its factorization.

21176942739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6320709.

The product of its digits is 1143072, while the sum is 51.

The spelling of 21176942739 in words is "twenty-one billion, one hundred seventy-six million, nine hundred forty-two thousand, seven hundred thirty-nine".