21133674 has 12 divisors (see below), whose sum is σ = 45789666. Its totient is φ = 7044552.

The previous prime is 21133667. The next prime is 21133687. The reversal of 21133674 is 47633112.

It can be written as a sum of positive squares in only one way, i.e., 21095649 + 38025 = 4593^2 + 195^2 .

It is a Curzon 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, 587029 + ... + 587064.

Almost surely, 2^21133674 is an apocalyptic number.

21133674 is an abundant number, since it is smaller than the sum of its proper divisors (24655992).

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

21133674 is a wasteful number, since it uses less digits than its factorization.

21133674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174101 (or 1174098 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 21133674 is about 4597.1375876734. The cubic root of 21133674 is about 276.4765710828.

Adding to 21133674 its reverse (47633112), we get a palindrome (68766786).

The spelling of 21133674 in words is "twenty-one million, one hundred thirty-three thousand, six hundred seventy-four".