20489463 has 32 divisors (see below), whose sum is σ = 31610880. Its totient is φ = 13106880.

The previous prime is 20489431. The next prime is 20489477. The reversal of 20489463 is 36498402.

It is a happy number.

It is not a de Polignac number, because 20489463 - 2⁵ = 20489431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20489423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91770 + ... + 91992.

It is an arithmetic number, because the mean of its divisors is an integer number (987840).

Almost surely, 2^20489463 is an apocalyptic number.

20489463 is a deficient number, since it is larger than the sum of its proper divisors (11121417).

20489463 is a wasteful number, since it uses less digits than its factorization.

20489463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 20489463 is about 4526.5288025152. The cubic root of 20489463 is about 273.6382843088.

It can be divided in two parts, 2048 and 9463, that added together give a palindrome (11511).

The spelling of 20489463 in words is "twenty million, four hundred eighty-nine thousand, four hundred sixty-three".