20141563 has 4 divisors (see below), whose sum is σ = 21690928. Its totient is φ = 18592200.

The previous prime is 20141543. The next prime is 20141567. The reversal of 20141563 is 36514102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36514102 = 2 ⋅18257051.

It is a cyclic number.

It is not a de Polignac number, because 20141563 - 2¹⁷ = 20010491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20141567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774663 + ... + 774688.

It is an arithmetic number, because the mean of its divisors is an integer number (5422732).

Almost surely, 2^20141563 is an apocalyptic number.

20141563 is a deficient number, since it is larger than the sum of its proper divisors (1549365).

20141563 is a wasteful number, since it uses less digits than its factorization.

20141563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549364.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20141563 is about 4487.9352713692. The cubic root of 20141563 is about 272.0806917098.

Adding to 20141563 its reverse (36514102), we get a palindrome (56655665).

The spelling of 20141563 in words is "twenty million, one hundred forty-one thousand, five hundred sixty-three".