21967674 has 32 divisors (see below), whose sum is σ = 45757440. Its totient is φ = 7022400.

The previous prime is 21967669. The next prime is 21967709. The reversal of 21967674 is 47676912.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32904 + ... + 33564.

It is an arithmetic number, because the mean of its divisors is an integer number (1429920).

Almost surely, 2^21967674 is an apocalyptic number.

21967674 is an abundant number, since it is smaller than the sum of its proper divisors (23789766).

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

21967674 is a wasteful number, since it uses less digits than its factorization.

21967674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886.

The product of its digits is 127008, while the sum is 42.

The square root of 21967674 is about 4686.9685298709. The cubic root of 21967674 is about 280.0666253019.

It can be divided in two parts, 2196 and 7674, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 21967674 in words is "twenty-one million, nine hundred sixty-seven thousand, six hundred seventy-four".