21674488 has 24 divisors (see below), whose sum is σ = 44672040. Its totient is φ = 9851600.

The previous prime is 21674449. The next prime is 21674491. The reversal of 21674488 is 88447612.

It is a self number, because there is not a number n which added to its sum of digits gives 21674488.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10228 + ... + 12163.

It is an arithmetic number, because the mean of its divisors is an integer number (1861335).

Almost surely, 2^21674488 is an apocalyptic number.

It is an amenable number.

21674488 is an abundant number, since it is smaller than the sum of its proper divisors (22997552).

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

21674488 is a wasteful number, since it uses less digits than its factorization.

21674488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22419 (or 22404 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 21674488 is about 4655.5867514203. The cubic root of 21674488 is about 278.8150948273.

The spelling of 21674488 in words is "twenty-one million, six hundred seventy-four thousand, four hundred eighty-eight".