21523274111 has 8 divisors (see below), whose sum is σ = 21622723200. Its totient is φ = 21423885952.

The previous prime is 21523274093. The next prime is 21523274117. The reversal of 21523274111 is 11147232512.

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 21523274111 - 2²² = 21519079807 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 (21523274117) 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, 790226 + ... + 817008.

It is an arithmetic number, because the mean of its divisors is an integer number (2702840400).

Almost surely, 2^21523274111 is an apocalyptic number.

21523274111 is a deficient number, since it is larger than the sum of its proper divisors (99449089).

21523274111 is a wasteful number, since it uses less digits than its factorization.

21523274111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30465.

The product of its digits is 3360, while the sum is 29.

The spelling of 21523274111 in words is "twenty-one billion, five hundred twenty-three million, two hundred seventy-four thousand, one hundred eleven".