21243004198 has 8 divisors (see below), whose sum is σ = 34315622208. Its totient is φ = 9804463464.

The previous prime is 21243004193. The next prime is 21243004219. The reversal of 21243004198 is 89140034212.

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 (21243004193) 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, 408519286 + ... + 408519337.

It is an arithmetic number, because the mean of its divisors is an integer number (4289452776).

Almost surely, 2^21243004198 is an apocalyptic number.

21243004198 is a deficient number, since it is larger than the sum of its proper divisors (13072618010).

21243004198 is a wasteful number, since it uses less digits than its factorization.

21243004198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817038638.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 21243004198 in words is "twenty-one billion, two hundred forty-three million, four thousand, one hundred ninety-eight".