21484485 has 24 divisors (see below), whose sum is σ = 40626144. Its totient is φ = 10416480.

The previous prime is 21484471. The next prime is 21484487. The reversal of 21484485 is 58448412.

It is not a de Polignac number, because 21484485 - 2⁴ = 21484469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21207 + ... + 22196.

It is an arithmetic number, because the mean of its divisors is an integer number (1692756).

Almost surely, 2^21484485 is an apocalyptic number.

It is an amenable number.

21484485 is a deficient number, since it is larger than the sum of its proper divisors (19141659).

21484485 is a wasteful number, since it uses less digits than its factorization.

21484485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43425 (or 43422 counting only the distinct ones).

The product of its digits is 40960, while the sum is 36.

The square root of 21484485 is about 4635.1359203372. The cubic root of 21484485 is about 277.9979857694.

The spelling of 21484485 in words is "twenty-one million, four hundred eighty-four thousand, four hundred eighty-five".