20868463 has 16 divisors (see below), whose sum is σ = 26553600. Its totient is φ = 16258200.

The previous prime is 20868461. The next prime is 20868473. The reversal of 20868463 is 36486802.

It is not a de Polignac number, because 20868463 - 2¹ = 20868461 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20868461) 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 15 ways as a sum of consecutive naturals, for example, 1008 + ... + 6538.

It is an arithmetic number, because the mean of its divisors is an integer number (1659600).

Almost surely, 2^20868463 is an apocalyptic number.

20868463 is a deficient number, since it is larger than the sum of its proper divisors (5685137).

20868463 is an equidigital number, since it uses as much as digits as its factorization.

20868463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563 (or 5549 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 20868463 is about 4568.2012871589. The cubic root of 20868463 is about 275.3151780298.

The spelling of 20868463 in words is "twenty million, eight hundred sixty-eight thousand, four hundred sixty-three".