21114863 has 24 divisors (see below), whose sum is σ = 26902176. Its totient is φ = 16220160.

The previous prime is 21114853. The next prime is 21114869. The reversal of 21114863 is 36841112.

It is not a de Polignac number, because 21114863 - 2⁸ = 21114607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82031 + ... + 82287.

It is an arithmetic number, because the mean of its divisors is an integer number (1120924).

Almost surely, 2^21114863 is an apocalyptic number.

21114863 is a deficient number, since it is larger than the sum of its proper divisors (5787313).

21114863 is a wasteful number, since it uses less digits than its factorization.

21114863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 372 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 21114863 is about 4595.0911851671. The cubic root of 21114863 is about 276.3945164968.

Adding to 21114863 its reverse (36841112), we get a palindrome (57955975).

The spelling of 21114863 in words is "twenty-one million, one hundred fourteen thousand, eight hundred sixty-three".