18203198893 has 8 divisors (see below), whose sum is σ = 20137726656. Its totient is φ = 16315286400.

The previous prime is 18203198891. The next prime is 18203198929. The reversal of 18203198893 is 39889130281.

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 18203198893 - 2¹ = 18203198891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18203198893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18203198891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11652996 + ... + 11654557.

It is an arithmetic number, because the mean of its divisors is an integer number (2517215832).

Almost surely, 2^18203198893 is an apocalyptic number.

It is an amenable number.

18203198893 is a deficient number, since it is larger than the sum of its proper divisors (1934527763).

18203198893 is a wasteful number, since it uses less digits than its factorization.

18203198893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23307635.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 18203198893 in words is "eighteen billion, two hundred three million, one hundred ninety-eight thousand, eight hundred ninety-three".