21041454 has 32 divisors (see below), whose sum is σ = 48416256. Its totient is φ = 5971680.

The previous prime is 21041453. The next prime is 21041479. The reversal of 21041454 is 45414012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21041454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4999 + ... + 8189.

It is an arithmetic number, because the mean of its divisors is an integer number (1513008).

Almost surely, 2^21041454 is an apocalyptic number.

21041454 is an abundant number, since it is smaller than the sum of its proper divisors (27374802).

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

21041454 is a wasteful number, since it uses less digits than its factorization.

21041454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 21041454 is about 4587.0964672655. The cubic root of 21041454 is about 276.0738355283.

Adding to 21041454 its reverse (45414012), we get a palindrome (66455466).

The spelling of 21041454 in words is "twenty-one million, forty-one thousand, four hundred fifty-four".