21168328039 has 8 divisors (see below), whose sum is σ = 22793415120. Its totient is φ = 19585451136.

The previous prime is 21168328037. The next prime is 21168328043. The reversal of 21168328039 is 93082386112.

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 21168328039 - 2¹ = 21168328037 is a prime.

It is a super-2 number, since 2×21168328039² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21168327986 and 21168328004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21168328037) 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, 10551504 + ... + 10553509.

It is an arithmetic number, because the mean of its divisors is an integer number (2849176890).

Almost surely, 2^21168328039 is an apocalyptic number.

21168328039 is a deficient number, since it is larger than the sum of its proper divisors (1625087081).

21168328039 is a wasteful number, since it uses less digits than its factorization.

21168328039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21105089.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 21168328039 in words is "twenty-one billion, one hundred sixty-eight million, three hundred twenty-eight thousand, thirty-nine".