21112233318 has 48 divisors (see below), whose sum is σ = 49984137216. Its totient is φ = 6387070320.

The previous prime is 21112233283. The next prime is 21112233319. The reversal of 21112233318 is 81333221112.

21112233318 is a `hidden beast` number, since 2 + 1 + 112 + 233 + 318 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21112233291 and 21112233300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112233319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32355 + ... + 208017.

It is an arithmetic number, because the mean of its divisors is an integer number (1041336192).

Almost surely, 2^21112233318 is an apocalyptic number.

21112233318 is an abundant number, since it is smaller than the sum of its proper divisors (28871903898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112233318 is a wasteful number, since it uses less digits than its factorization.

21112233318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176289 (or 176286 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The spelling of 21112233318 in words is "twenty-one billion, one hundred twelve million, two hundred thirty-three thousand, three hundred eighteen".