20432863 has 4 divisors (see below), whose sum is σ = 22290408. Its totient is φ = 18575320.

The previous prime is 20432851. The next prime is 20432873. The reversal of 20432863 is 36823402.

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 20432863 - 2²¹ = 18335711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432803) 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, 928756 + ... + 928777.

It is an arithmetic number, because the mean of its divisors is an integer number (5572602).

Almost surely, 2^20432863 is an apocalyptic number.

20432863 is a deficient number, since it is larger than the sum of its proper divisors (1857545).

20432863 is a wasteful number, since it uses less digits than its factorization.

20432863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857544.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20432863 is about 4520.2724475412. The cubic root of 20432863 is about 273.3860862224.

The spelling of 20432863 in words is "twenty million, four hundred thirty-two thousand, eight hundred sixty-three".