21514453 has 8 divisors (see below), whose sum is σ = 22583808. Its totient is φ = 20456304.

The previous prime is 21514439. The next prime is 21514483. The reversal of 21514453 is 35441512.

It is a happy number.

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 21514453 - 2⁵ = 21514421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1276 + ... + 6682.

It is an arithmetic number, because the mean of its divisors is an integer number (2822976).

Almost surely, 2^21514453 is an apocalyptic number.

21514453 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21514453 is a deficient number, since it is larger than the sum of its proper divisors (1069355).

21514453 is a wasteful number, since it uses less digits than its factorization.

21514453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5603.

The product of its digits is 2400, while the sum is 25.

The square root of 21514453 is about 4638.3674929872. The cubic root of 21514453 is about 278.1271824598.

Adding to 21514453 its reverse (35441512), we get a palindrome (56955965).

The spelling of 21514453 in words is "twenty-one million, five hundred fourteen thousand, four hundred fifty-three".