21112674 has 64 divisors (see below), whose sum is σ = 50429952. Its totient is φ = 5817600.

The previous prime is 21112673. The next prime is 21112711. The reversal of 21112674 is 47621112.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21112673) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34479 + ... + 35085.

It is an arithmetic number, because the mean of its divisors is an integer number (787968).

Almost surely, 2^21112674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25214976).

21112674 is an abundant number, since it is smaller than the sum of its proper divisors (29317278).

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

21112674 is a wasteful number, since it uses less digits than its factorization.

21112674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its digits is 672, while the sum is 24.

The square root of 21112674 is about 4594.8529900313. The cubic root of 21112674 is about 276.3849647968.

Adding to 21112674 its reverse (47621112), we get a palindrome (68733786).

The spelling of 21112674 in words is "twenty-one million, one hundred twelve thousand, six hundred seventy-four".