21711374 has 8 divisors (see below), whose sum is σ = 33025968. Its totient is φ = 10702720.

The previous prime is 21711331. The next prime is 21711419. The reversal of 21711374 is 47311712.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 76307 + ... + 76590.

It is an arithmetic number, because the mean of its divisors is an integer number (4128246).

Almost surely, 2^21711374 is an apocalyptic number.

21711374 is a deficient number, since it is larger than the sum of its proper divisors (11314594).

21711374 is a wasteful number, since it uses less digits than its factorization.

21711374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152970.

The product of its digits is 1176, while the sum is 26.

The square root of 21711374 is about 4659.5465444612. The cubic root of 21711374 is about 278.9731692273.

The spelling of 21711374 in words is "twenty-one million, seven hundred eleven thousand, three hundred seventy-four".