21498112 has 36 divisors (see below), whose sum is σ = 43496320. Its totient is φ = 10603008.

The previous prime is 21498109. The next prime is 21498121. The reversal of 21498112 is 21189412.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19693 + ... + 20755.

Almost surely, 2^21498112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21498112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21748160).

21498112 is an abundant number, since it is smaller than the sum of its proper divisors (21998208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21498112 is an equidigital number, since it uses as much as digits as its factorization.

21498112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1144 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 21498112 is about 4636.6056550024. The cubic root of 21498112 is about 278.0567487621.

The spelling of 21498112 in words is "twenty-one million, four hundred ninety-eight thousand, one hundred twelve".