21198835296 has 60 divisors (see below), whose sum is σ = 62345193372. Its totient is φ = 7066277568.

The previous prime is 21198835291. The next prime is 21198835319. The reversal of 21198835296 is 69253889112.

21198835296 is a `hidden beast` number, since 21 + 1 + 98 + 8 + 3 + 529 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21198835291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4086690 + ... + 4091873.

Almost surely, 2^21198835296 is an apocalyptic number.

It is an amenable number.

21198835296 is an abundant number, since it is smaller than the sum of its proper divisors (41146358076).

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

21198835296 is an equidigital number, since it uses as much as digits as its factorization.

21198835296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8178585 (or 8178568 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The spelling of 21198835296 in words is "twenty-one billion, one hundred ninety-eight million, eight hundred thirty-five thousand, two hundred ninety-six".