21674260 has 12 divisors (see below), whose sum is σ = 45515988. Its totient is φ = 8669696.

The previous prime is 21674249. The next prime is 21674287. The reversal of 21674260 is 6247612.

It can be written as a sum of positive squares in 2 ways, for example, as 9647236 + 12027024 = 3106^2 + 3468^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541837 + ... + 541876.

It is an arithmetic number, because the mean of its divisors is an integer number (3792999).

Almost surely, 2^21674260 is an apocalyptic number.

21674260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21674260 is an abundant number, since it is smaller than the sum of its proper divisors (23841728).

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

21674260 is a wasteful number, since it uses less digits than its factorization.

21674260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083722 (or 1083720 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 21674260 is about 4655.5622646465. The cubic root of 21674260 is about 278.8141171792.

The spelling of 21674260 in words is "twenty-one million, six hundred seventy-four thousand, two hundred sixty".