20831463 has 12 divisors (see below), whose sum is σ = 30132648. Its totient is φ = 13867920.

The previous prime is 20831323. The next prime is 20831533. The reversal of 20831463 is 36413802.

It is a happy number.

It is not a de Polignac number, because 20831463 - 2¹⁴ = 20815079 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20839463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8056 + ... + 10322.

It is an arithmetic number, because the mean of its divisors is an integer number (2511054).

Almost surely, 2^20831463 is an apocalyptic number.

20831463 is a deficient number, since it is larger than the sum of its proper divisors (9301185).

20831463 is a wasteful number, since it uses less digits than its factorization.

20831463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294 (or 3291 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20831463 is about 4564.1497565264. The cubic root of 20831463 is about 275.1523695553.

The spelling of 20831463 in words is "twenty million, eight hundred thirty-one thousand, four hundred sixty-three".