20974327 has 4 divisors (see below), whose sum is σ = 22881096. Its totient is φ = 19067560.

The previous prime is 20974319. The next prime is 20974333. The reversal of 20974327 is 72347902.

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

It is a cyclic number.

It is not a de Polignac number, because 20974327 - 2³ = 20974319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20974292 and 20974301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20974307) by changing a digit.

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, 953368 + ... + 953389.

It is an arithmetic number, because the mean of its divisors is an integer number (5720274).

Almost surely, 2^20974327 is an apocalyptic number.

20974327 is a deficient number, since it is larger than the sum of its proper divisors (1906769).

20974327 is a wasteful number, since it uses less digits than its factorization.

20974327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906768.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 20974327 is about 4579.7736843648. The cubic root of 20974327 is about 275.7799434417.

The spelling of 20974327 in words is "twenty million, nine hundred seventy-four thousand, three hundred twenty-seven".