20475663 has 8 divisors (see below), whose sum is σ = 29401008. Its totient is φ = 12600384.

The previous prime is 20475661. The next prime is 20475677. The reversal of 20475663 is 36657402.

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

It is not a de Polignac number, because 20475663 - 2¹ = 20475661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20475661) 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, 262470 + ... + 262547.

It is an arithmetic number, because the mean of its divisors is an integer number (3675126).

Almost surely, 2^20475663 is an apocalyptic number.

20475663 is a deficient number, since it is larger than the sum of its proper divisors (8925345).

20475663 is a wasteful number, since it uses less digits than its factorization.

20475663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525033.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 20475663 is about 4525.0041988931. The cubic root of 20475663 is about 273.5768371734.

The spelling of 20475663 in words is "twenty million, four hundred seventy-five thousand, six hundred sixty-three".