21373174 has 24 divisors (see below), whose sum is σ = 33801768. Its totient is φ = 10133760.

The previous prime is 21373171. The next prime is 21373207. The reversal of 21373174 is 47137312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163089 + ... + 163219.

It is an arithmetic number, because the mean of its divisors is an integer number (1408407).

Almost surely, 2^21373174 is an apocalyptic number.

21373174 is a deficient number, since it is larger than the sum of its proper divisors (12428594).

21373174 is a wasteful number, since it uses less digits than its factorization.

21373174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 259 counting only the distinct ones).

The product of its digits is 3528, while the sum is 28.

The square root of 21373174 is about 4623.1130204658. The cubic root of 21373174 is about 277.5170522216.

The spelling of 21373174 in words is "twenty-one million, three hundred seventy-three thousand, one hundred seventy-four".