21674422 has 48 divisors (see below), whose sum is σ = 43147008. Its totient is φ = 7931520.

The previous prime is 21674413. The next prime is 21674423. The reversal of 21674422 is 22447612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21674423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44263 + ... + 44749.

It is an arithmetic number, because the mean of its divisors is an integer number (898896).

Almost surely, 2^21674422 is an apocalyptic number.

21674422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21674422 is a deficient number, since it is larger than the sum of its proper divisors (21472586).

21674422 is a wasteful number, since it uses less digits than its factorization.

21674422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 524 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 21674422 is about 4655.5796631569. The cubic root of 21674422 is about 278.8148118246.

The spelling of 21674422 in words is "twenty-one million, six hundred seventy-four thousand, four hundred twenty-two".