21836883518387 has 8 divisors (see below), whose sum is σ = 24957180289536. Its totient is φ = 18716772242952.

The previous prime is 21836883518363. The next prime is 21836883518413. The reversal of 21836883518387 is 78381538863812.

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

It is not a de Polignac number, because 21836883518387 - 2¹⁶ = 21836883452851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21836883518387.

It is not an unprimeable number, because it can be changed into a prime (21836883515387) 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, 46121573 + ... + 46592630.

It is an arithmetic number, because the mean of its divisors is an integer number (3119647536192).

Almost surely, 2^{21836883518387} is an apocalyptic number.

21836883518387 is a deficient number, since it is larger than the sum of its proper divisors (3120296771149).

21836883518387 is an equidigital number, since it uses as much as digits as its factorization.

21836883518387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92747857.

The product of its digits is 371589120, while the sum is 71.

It can be divided in two parts, 2183688 and 3518387, that added together give a palindrome (5702075).

The spelling of 21836883518387 in words is "twenty-one trillion, eight hundred thirty-six billion, eight hundred eighty-three million, five hundred eighteen thousand, three hundred eighty-seven".