21868572385007 has 4 divisors (see below), whose sum is σ = 21983067528576. Its totient is φ = 21754077241440.

The previous prime is 21868572384949. The next prime is 21868572385027. The reversal of 21868572385007 is 70058327586812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21868572385007 - 2⁸ = 21868572384751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21868572385027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57247571498 + ... + 57247571879.

It is an arithmetic number, because the mean of its divisors is an integer number (5495766882144).

Almost surely, 2^{21868572385007} is an apocalyptic number.

21868572385007 is a deficient number, since it is larger than the sum of its proper divisors (114495143569).

21868572385007 is a wasteful number, since it uses less digits than its factorization.

21868572385007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114495143568.

The product of its (nonzero) digits is 45158400, while the sum is 62.

The spelling of 21868572385007 in words is "twenty-one trillion, eight hundred sixty-eight billion, five hundred seventy-two million, three hundred eighty-five thousand, seven".