21485099 has 8 divisors (see below), whose sum is σ = 21780000. Its totient is φ = 21192192.

The previous prime is 21485089. The next prime is 21485111. The reversal of 21485099 is 99058412.

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 21485099 - 2⁴ = 21485083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21485039) 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, 47627 + ... + 48075.

It is an arithmetic number, because the mean of its divisors is an integer number (2722500).

Almost surely, 2^21485099 is an apocalyptic number.

21485099 is a deficient number, since it is larger than the sum of its proper divisors (294901).

21485099 is a wasteful number, since it uses less digits than its factorization.

21485099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 21485099 is about 4635.2021530889. The cubic root of 21485099 is about 278.0006340237. Note that the first 3 decimals are identical.

The spelling of 21485099 in words is "twenty-one million, four hundred eighty-five thousand, ninety-nine".