18803064921 has 16 divisors (see below), whose sum is σ = 25951959360. Its totient is φ = 12095330240.

The previous prime is 18803064887. The next prime is 18803064967. The reversal of 18803064921 is 12946030881.

It is a cyclic number.

It is not a de Polignac number, because 18803064921 - 2⁷ = 18803064793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18803064821) 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, 67891 + ... + 205463.

It is an arithmetic number, because the mean of its divisors is an integer number (1621997460).

Almost surely, 2^18803064921 is an apocalyptic number.

It is an amenable number.

18803064921 is a deficient number, since it is larger than the sum of its proper divisors (7148894439).

18803064921 is a wasteful number, since it uses less digits than its factorization.

18803064921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139176.

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 18803064921 in words is "eighteen billion, eight hundred three million, sixty-four thousand, nine hundred twenty-one".