21273174 has 24 divisors (see below), whose sum is σ = 49637952. Its totient is φ = 6545520.

The previous prime is 21273169. The next prime is 21273181. The reversal of 21273174 is 47137212.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 45222 + ... + 45689.

It is an arithmetic number, because the mean of its divisors is an integer number (2068248).

Almost surely, 2^21273174 is an apocalyptic number.

21273174 is an abundant number, since it is smaller than the sum of its proper divisors (28364778).

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

21273174 is a wasteful number, since it uses less digits than its factorization.

21273174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90932 (or 90929 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 21273174 is about 4612.2851169458. The cubic root of 21273174 is about 277.0835633493.

The spelling of 21273174 in words is "twenty-one million, two hundred seventy-three thousand, one hundred seventy-four".