21361174 has 4 divisors (see below), whose sum is σ = 32041764. Its totient is φ = 10680586.

The previous prime is 21361169. The next prime is 21361183. The reversal of 21361174 is 47116312.

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, 5340292 + ... + 5340295.

It is an arithmetic number, because the mean of its divisors is an integer number (8010441).

Almost surely, 2^21361174 is an apocalyptic number.

21361174 is a deficient number, since it is larger than the sum of its proper divisors (10680590).

21361174 is a wasteful number, since it uses less digits than its factorization.

21361174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10680589.

The product of its digits is 1008, while the sum is 25.

The square root of 21361174 is about 4621.8150114430. The cubic root of 21361174 is about 277.4651050460.

Adding to 21361174 its reverse (47116312), we get a palindrome (68477486).

The spelling of 21361174 in words is "twenty-one million, three hundred sixty-one thousand, one hundred seventy-four".