21500111713 has 8 divisors (see below), whose sum is σ = 22634364800. Its totient is φ = 20366125488.

The previous prime is 21500111681. The next prime is 21500111719. The reversal of 21500111713 is 31711100512.

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 21500111713 - 2⁵ = 21500111681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21500111719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110803 + ... + 235111.

It is an arithmetic number, because the mean of its divisors is an integer number (2829295600).

Almost surely, 2^21500111713 is an apocalyptic number.

It is an amenable number.

21500111713 is a deficient number, since it is larger than the sum of its proper divisors (1134253087).

21500111713 is a wasteful number, since it uses less digits than its factorization.

21500111713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133431.

The product of its (nonzero) digits is 210, while the sum is 22.

The spelling of 21500111713 in words is "twenty-one billion, five hundred million, one hundred eleven thousand, seven hundred thirteen".