21185386722039 has 8 divisors (see below), whose sum is σ = 28725948097920. Its totient is φ = 13884208247096.

The previous prime is 21185386722037. The next prime is 21185386722089. The reversal of 21185386722039 is 93022768358112.

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 21185386722039 - 2¹ = 21185386722037 is a prime.

It is a super-2 number, since 2×21185386722039² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21185386722039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21185386722037) 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, 59845725027 + ... + 59845725380.

It is an arithmetic number, because the mean of its divisors is an integer number (3590743512240).

Almost surely, 2^{21185386722039} is an apocalyptic number.

21185386722039 is a deficient number, since it is larger than the sum of its proper divisors (7540561375881).

21185386722039 is a wasteful number, since it uses less digits than its factorization.

21185386722039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119691450469.

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 21185386722039 in words is "twenty-one trillion, one hundred eighty-five billion, three hundred eighty-six million, seven hundred twenty-two thousand, thirty-nine".