1818808893 has 12 divisors (see below), whose sum is σ = 2866002048. Its totient is φ = 1102308360.

The previous prime is 1818808891. The next prime is 1818808933. The reversal of 1818808893 is 3988088181.

1818808893 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1818808893 - 2¹ = 1818808891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818808891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9185805 + ... + 9186002.

It is an arithmetic number, because the mean of its divisors is an integer number (238833504).

Almost surely, 2^1818808893 is an apocalyptic number.

It is an amenable number.

1818808893 is a deficient number, since it is larger than the sum of its proper divisors (1047193155).

1818808893 is a wasteful number, since it uses less digits than its factorization.

1818808893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18371824 (or 18371821 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 54.

The square root of 1818808893 is about 42647.4957412507. The cubic root of 1818808893 is about 1220.6627441386.

It can be divided in two parts, 18188088 and 93, that added together give a palindrome (18188181).

The spelling of 1818808893 in words is "one billion, eight hundred eighteen million, eight hundred eight thousand, eight hundred ninety-three".