21753374 has 4 divisors (see below), whose sum is σ = 32630064. Its totient is φ = 10876686.

The previous prime is 21753367. The next prime is 21753409. The reversal of 21753374 is 47335712.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21753374.

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, 5438342 + ... + 5438345.

It is an arithmetic number, because the mean of its divisors is an integer number (8157516).

Almost surely, 2^21753374 is an apocalyptic number.

21753374 is a deficient number, since it is larger than the sum of its proper divisors (10876690).

21753374 is a wasteful number, since it uses less digits than its factorization.

21753374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10876689.

The product of its digits is 17640, while the sum is 32.

The square root of 21753374 is about 4664.0512432862. The cubic root of 21753374 is about 279.1529417574.

The spelling of 21753374 in words is "twenty-one million, seven hundred fifty-three thousand, three hundred seventy-four".