21198353803 has 8 divisors (see below), whose sum is σ = 23127390000. Its totient is φ = 19269636480.

The previous prime is 21198353783. The next prime is 21198353807. The reversal of 21198353803 is 30835389112.

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

It is a cyclic number.

It is not a de Polignac number, because 21198353803 - 2²¹ = 21196256651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21198353803.

It is not an unprimeable number, because it can be changed into a prime (21198353807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71823 + ... + 218071.

It is an arithmetic number, because the mean of its divisors is an integer number (2890923750).

Almost surely, 2^21198353803 is an apocalyptic number.

21198353803 is a deficient number, since it is larger than the sum of its proper divisors (1929036197).

21198353803 is a wasteful number, since it uses less digits than its factorization.

21198353803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159437.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 21198353803 in words is "twenty-one billion, one hundred ninety-eight million, three hundred fifty-three thousand, eight hundred three".