18200919181819 has 16 divisors (see below), whose sum is σ = 20750272899840. Its totient is φ = 15802869580960.

The previous prime is 18200919181817. The next prime is 18200919181829. The reversal of 18200919181819 is 91818191900281.

It is not a de Polignac number, because 18200919181819 - 2¹ = 18200919181817 is a prime.

It is a super-2 number, since 2×18200919181819² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18200919181817) 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, 54416272 + ... + 54749725.

It is an arithmetic number, because the mean of its divisors is an integer number (1296892056240).

Almost surely, 2^{18200919181819} is an apocalyptic number.

18200919181819 is a deficient number, since it is larger than the sum of its proper divisors (2549353718021).

18200919181819 is a wasteful number, since it uses less digits than its factorization.

18200919181819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109166690.

The product of its (nonzero) digits is 746496, while the sum is 58.

The spelling of 18200919181819 in words is "eighteen trillion, two hundred billion, nine hundred nineteen million, one hundred eighty-one thousand, eight hundred nineteen".