21484910 has 8 divisors (see below), whose sum is σ = 38672856. Its totient is φ = 8593960.

The previous prime is 21484843. The next prime is 21484913. The reversal of 21484910 is 1948412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484913) 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, 1074236 + ... + 1074255.

It is an arithmetic number, because the mean of its divisors is an integer number (4834107).

Almost surely, 2^21484910 is an apocalyptic number.

21484910 is a deficient number, since it is larger than the sum of its proper divisors (17187946).

21484910 is a wasteful number, since it uses less digits than its factorization.

21484910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148498.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 21484910 is about 4635.1817655837. The cubic root of 21484910 is about 277.9998188498. Note that the first 3 decimals are identical.

The spelling of 21484910 in words is "twenty-one million, four hundred eighty-four thousand, nine hundred ten".