21114454 has 8 divisors (see below), whose sum is σ = 31985568. Its totient is φ = 10452600.

The previous prime is 21114451. The next prime is 21114461. The reversal of 21114454 is 45441112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114451) 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 3 ways as a sum of consecutive naturals, for example, 52062 + ... + 52465.

It is an arithmetic number, because the mean of its divisors is an integer number (3998196).

Almost surely, 2^21114454 is an apocalyptic number.

21114454 is a deficient number, since it is larger than the sum of its proper divisors (10871114).

21114454 is a wasteful number, since it uses less digits than its factorization.

21114454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104630.

The product of its digits is 640, while the sum is 22.

The square root of 21114454 is about 4595.0466809381. The cubic root of 21114454 is about 276.3927318757.

Adding to 21114454 its reverse (45441112), we get a palindrome (66555566).

The spelling of 21114454 in words is "twenty-one million, one hundred fourteen thousand, four hundred fifty-four".