21114631 has 8 divisors (see below), whose sum is σ = 21836304. Its totient is φ = 20402880.

The previous prime is 21114623. The next prime is 21114647. The reversal of 21114631 is 13641112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21114631 - 2³ = 21114623 is a prime.

It is a super-2 number, since 2×21114631² = 891655284532322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21114599 and 21114608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1981 + ... + 6793.

It is an arithmetic number, because the mean of its divisors is an integer number (2729538).

Almost surely, 2^21114631 is an apocalyptic number.

21114631 is a deficient number, since it is larger than the sum of its proper divisors (721673).

21114631 is a wasteful number, since it uses less digits than its factorization.

21114631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961.

The product of its digits is 144, while the sum is 19.

The square root of 21114631 is about 4595.0659407673. The cubic root of 21114631 is about 276.3935041962.

Adding to 21114631 its reverse (13641112), we get a palindrome (34755743).

The spelling of 21114631 in words is "twenty-one million, one hundred fourteen thousand, six hundred thirty-one".