20375663 has 8 divisors (see below), whose sum is σ = 25403520. Its totient is φ = 15877080.

The previous prime is 20375633. The next prime is 20375699. The reversal of 20375663 is 36657302.

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

It is a cyclic number.

It is not a de Polignac number, because 20375663 - 2¹⁰ = 20374639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20375633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132233 + ... + 132386.

It is an arithmetic number, because the mean of its divisors is an integer number (3175440).

Almost surely, 2^20375663 is an apocalyptic number.

20375663 is a deficient number, since it is larger than the sum of its proper divisors (5027857).

20375663 is a wasteful number, since it uses less digits than its factorization.

20375663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264637.

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 20375663 is about 4513.9409610672. The cubic root of 20375663 is about 273.1307410467.

The spelling of 20375663 in words is "twenty million, three hundred seventy-five thousand, six hundred sixty-three".