21325454 has 8 divisors (see below), whose sum is σ = 32011200. Its totient is φ = 10655056.

The previous prime is 21325441. The next prime is 21325457. The reversal of 21325454 is 45452312.

It is a happy number.

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

It is a super-2 number, since 2×21325454² = 909549976612232, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21325457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722 + ... + 6570.

It is an arithmetic number, because the mean of its divisors is an integer number (4001400).

Almost surely, 2^21325454 is an apocalyptic number.

21325454 is a deficient number, since it is larger than the sum of its proper divisors (10685746).

21325454 is a wasteful number, since it uses less digits than its factorization.

21325454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674.

The product of its digits is 4800, while the sum is 26.

The square root of 21325454 is about 4617.9491118894. The cubic root of 21325454 is about 277.3103603819.

Adding to 21325454 its reverse (45452312), we get a palindrome (66777766).

The spelling of 21325454 in words is "twenty-one million, three hundred twenty-five thousand, four hundred fifty-four".