21674352 has 80 divisors (see below), whose sum is σ = 64495872. Its totient is φ = 6144000.

The previous prime is 21674351. The next prime is 21674377. The reversal of 21674352 is 25347612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21674351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84208 + ... + 84464.

Almost surely, 2^21674352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21674352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32247936).

21674352 is an abundant number, since it is smaller than the sum of its proper divisors (42821520).

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

21674352 is a wasteful number, since it uses less digits than its factorization.

21674352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 520 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 21674352 is about 4655.5721452900. The cubic root of 21674352 is about 278.8145116696.

The spelling of 21674352 in words is "twenty-one million, six hundred seventy-four thousand, three hundred fifty-two".