21433274 has 4 divisors (see below), whose sum is σ = 32149914. Its totient is φ = 10716636.

The previous prime is 21433259. The next prime is 21433289. The reversal of 21433274 is 47233412.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21433259) and next prime (21433289).

It can be written as a sum of positive squares in only one way, i.e., 11854249 + 9579025 = 3443^2 + 3095^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5358317 + ... + 5358320.

Almost surely, 2^21433274 is an apocalyptic number.

21433274 is a deficient number, since it is larger than the sum of its proper divisors (10716640).

21433274 is a wasteful number, since it uses less digits than its factorization.

21433274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10716639.

The product of its digits is 4032, while the sum is 26.

The square root of 21433274 is about 4629.6084067662. The cubic root of 21433274 is about 277.7769288626.

Adding to 21433274 its reverse (47233412), we get a palindrome (68666686).

The spelling of 21433274 in words is "twenty-one million, four hundred thirty-three thousand, two hundred seventy-four".