21748962111 has 4 divisors (see below), whose sum is σ = 28998616152. Its totient is φ = 14499308072.

The previous prime is 21748962091. The next prime is 21748962233. The reversal of 21748962111 is 11126984712.

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 21748962111 - 2²⁶ = 21681853247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21748960111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3624827016 + ... + 3624827021.

It is an arithmetic number, because the mean of its divisors is an integer number (7249654038).

Almost surely, 2^21748962111 is an apocalyptic number.

21748962111 is a deficient number, since it is larger than the sum of its proper divisors (7249654041).

21748962111 is an equidigital number, since it uses as much as digits as its factorization.

21748962111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7249654040.

The product of its digits is 48384, while the sum is 42.

The spelling of 21748962111 in words is "twenty-one billion, seven hundred forty-eight million, nine hundred sixty-two thousand, one hundred eleven".