21198496 has 24 divisors (see below), whose sum is σ = 45529344. Its totient is φ = 9635520.

The previous prime is 21198493. The next prime is 21198497. The reversal of 21198496 is 69489112.

It is not an unprimeable number, because it can be changed into a prime (21198493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29760 + ... + 30463.

It is an arithmetic number, because the mean of its divisors is an integer number (1897056).

Almost surely, 2^21198496 is an apocalyptic number.

It is an amenable number.

21198496 is an abundant number, since it is smaller than the sum of its proper divisors (24330848).

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

21198496 is a wasteful number, since it uses less digits than its factorization.

21198496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60244 (or 60236 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 21198496 is about 4604.1824464285. The cubic root of 21198496 is about 276.7589556793.

The spelling of 21198496 in words is "twenty-one million, one hundred ninety-eight thousand, four hundred ninety-six".