21162523611423 has 8 divisors (see below), whose sum is σ = 28217819249536. Its totient is φ = 14107788523800.

The previous prime is 21162523611403. The next prime is 21162523611433. The reversal of 21162523611423 is 32411632526112.

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

It is not a de Polignac number, because 21162523611423 - 2⁹ = 21162523610911 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 (21162523611403) 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, 140049523 + ... + 140200548.

It is an arithmetic number, because the mean of its divisors is an integer number (3527227406192).

Almost surely, 2^{21162523611423} is an apocalyptic number.

21162523611423 is a deficient number, since it is larger than the sum of its proper divisors (7055295638113).

21162523611423 is a wasteful number, since it uses less digits than its factorization.

21162523611423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280275245.

The product of its digits is 103680, while the sum is 39.

The spelling of 21162523611423 in words is "twenty-one trillion, one hundred sixty-two billion, five hundred twenty-three million, six hundred eleven thousand, four hundred twenty-three".