21674524 has 12 divisors (see below), whose sum is σ = 40161744. Its totient is φ = 10199744.

The previous prime is 21674501. The next prime is 21674539. The reversal of 21674524 is 42547612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159304 + ... + 159439.

It is an arithmetic number, because the mean of its divisors is an integer number (3346812).

Almost surely, 2^21674524 is an apocalyptic number.

It is an amenable number.

21674524 is a deficient number, since it is larger than the sum of its proper divisors (18487220).

21674524 is a wasteful number, since it uses less digits than its factorization.

21674524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318764 (or 318762 counting only the distinct ones).

The product of its digits is 13440, while the sum is 31.

The square root of 21674524 is about 4655.5906177412. The cubic root of 21674524 is about 278.8152491922.

The spelling of 21674524 in words is "twenty-one million, six hundred seventy-four thousand, five hundred twenty-four".