20146563 has 10 divisors (see below), whose sum is σ = 30095604. Its totient is φ = 13430988.

The previous prime is 20146543. The next prime is 20146573. The reversal of 20146563 is 36564102.

20146563 is a `hidden beast` number, since 2 + 0 + 1 + 4 + 656 + 3 = 666.

It is not a de Polignac number, because 20146563 - 2¹⁴ = 20130179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20146523) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124281 + ... + 124442.

Almost surely, 2^20146563 is an apocalyptic number.

20146563 is a deficient number, since it is larger than the sum of its proper divisors (9949041).

20146563 is an equidigital number, since it uses as much as digits as its factorization.

20146563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248735 (or 248726 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20146563 is about 4488.4922858350. The cubic root of 20146563 is about 272.1032038803.

It can be divided in two parts, 201 and 46563, that added together give a palindrome (46764).

The spelling of 20146563 in words is "twenty million, one hundred forty-six thousand, five hundred sixty-three".