20832563 has 4 divisors (see below), whose sum is σ = 21038928. Its totient is φ = 20626200.

The previous prime is 20832533. The next prime is 20832577. The reversal of 20832563 is 36523802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20832563 - 2⁸ = 20832307 is a prime.

It is a super-2 number, since 2×20832563² = 867991362297938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20832523) 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, 103031 + ... + 103232.

It is an arithmetic number, because the mean of its divisors is an integer number (5259732).

Almost surely, 2^20832563 is an apocalyptic number.

20832563 is a deficient number, since it is larger than the sum of its proper divisors (206365).

20832563 is a wasteful number, since it uses less digits than its factorization.

20832563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206364.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20832563 is about 4564.2702593076. The cubic root of 20832563 is about 275.1572125866.

The spelling of 20832563 in words is "twenty million, eight hundred thirty-two thousand, five hundred sixty-three".