21898666803 has 16 divisors (see below), whose sum is σ = 32175503360. Its totient is φ = 13162703904.

The previous prime is 21898666793. The next prime is 21898666831. The reversal of 21898666803 is 30866689812.

It is not a de Polignac number, because 21898666803 - 2¹⁷ = 21898535731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21898666703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6527443 + ... + 6530796.

It is an arithmetic number, because the mean of its divisors is an integer number (2010968960).

Almost surely, 2^21898666803 is an apocalyptic number.

21898666803 is a deficient number, since it is larger than the sum of its proper divisors (10276836557).

21898666803 is a wasteful number, since it uses less digits than its factorization.

21898666803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13058298.

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 21898666803 in words is "twenty-one billion, eight hundred ninety-eight million, six hundred sixty-six thousand, eight hundred three".