21374174 has 4 divisors (see below), whose sum is σ = 32061264. Its totient is φ = 10687086.

The previous prime is 21374167. The next prime is 21374203. The reversal of 21374174 is 47147312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5343542 + ... + 5343545.

It is an arithmetic number, because the mean of its divisors is an integer number (8015316).

Almost surely, 2^21374174 is an apocalyptic number.

21374174 is a deficient number, since it is larger than the sum of its proper divisors (10687090).

21374174 is a wasteful number, since it uses less digits than its factorization.

21374174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10687089.

The product of its digits is 4704, while the sum is 29.

The square root of 21374174 is about 4623.2211714345. The cubic root of 21374174 is about 277.5213802752.

The spelling of 21374174 in words is "twenty-one million, three hundred seventy-four thousand, one hundred seventy-four".