20463985 has 8 divisors (see below), whose sum is σ = 24615360. Its totient is φ = 16332144.

The previous prime is 20463979. The next prime is 20464009. The reversal of 20463985 is 58936402.

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 20463985 - 2⁵ = 20463953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2467 + ... + 6856.

It is an arithmetic number, because the mean of its divisors is an integer number (3076920).

Almost surely, 2^20463985 is an apocalyptic number.

It is an amenable number.

20463985 is a deficient number, since it is larger than the sum of its proper divisors (4151375).

20463985 is an equidigital number, since it uses as much as digits as its factorization.

20463985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9767.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 20463985 is about 4523.7136293094. The cubic root of 20463985 is about 273.5248170772.

The spelling of 20463985 in words is "twenty million, four hundred sixty-three thousand, nine hundred eighty-five".