21484454 has 8 divisors (see below), whose sum is σ = 32253600. Its totient is φ = 10733256.

The previous prime is 21484453. The next prime is 21484469. The reversal of 21484454 is 45448412.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21484454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484453) 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, 929 + ... + 6620.

It is an arithmetic number, because the mean of its divisors is an integer number (4031700).

Almost surely, 2^21484454 is an apocalyptic number.

21484454 is a deficient number, since it is larger than the sum of its proper divisors (10769146).

21484454 is a wasteful number, since it uses less digits than its factorization.

21484454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8974.

The product of its digits is 20480, while the sum is 32.

The square root of 21484454 is about 4635.1325763132. The cubic root of 21484454 is about 277.9978520615.

The spelling of 21484454 in words is "twenty-one million, four hundred eighty-four thousand, four hundred fifty-four".