21614454 has 48 divisors (see below), whose sum is σ = 49533120. Its totient is φ = 6800640.

The previous prime is 21614441. The next prime is 21614491. The reversal of 21614454 is 45441612.

21614454 is a `hidden beast` number, since 2 + 1 + 614 + 45 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24094 + ... + 24974.

It is an arithmetic number, because the mean of its divisors is an integer number (1031940).

Almost surely, 2^21614454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21614454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24766560).

21614454 is an abundant number, since it is smaller than the sum of its proper divisors (27918666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21614454 is a wasteful number, since it uses less digits than its factorization.

21614454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965 (or 962 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 21614454 is about 4649.1347582104. The cubic root of 21614454 is about 278.5574360963.

The spelling of 21614454 in words is "twenty-one million, six hundred fourteen thousand, four hundred fifty-four".