21150674 has 8 divisors (see below), whose sum is σ = 32263920. Its totient is φ = 10396036.

The previous prime is 21150673. The next prime is 21150683. The reversal of 21150674 is 47605112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21150671) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 89504 + ... + 89739.

It is an arithmetic number, because the mean of its divisors is an integer number (4032990).

Almost surely, 2^21150674 is an apocalyptic number.

21150674 is a deficient number, since it is larger than the sum of its proper divisors (11113246).

21150674 is a wasteful number, since it uses less digits than its factorization.

21150674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179304.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 21150674 is about 4598.9861926298. The cubic root of 21150674 is about 276.5506841154.

Adding to 21150674 its reverse (47605112), we get a palindrome (68755786).

The spelling of 21150674 in words is "twenty-one million, one hundred fifty thousand, six hundred seventy-four".