1802189113 has 4 divisors (see below), whose sum is σ = 1809201780. Its totient is φ = 1795176448.

The previous prime is 1802189111. The next prime is 1802189131. The reversal of 1802189113 is 3119812081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3119812081 = 29387 ⋅106163.

It can be written as a sum of positive squares in 2 ways, for example, as 1780164864 + 22024249 = 42192^2 + 4693^2 .

It is a cyclic number.

It is not a de Polignac number, because 1802189113 - 2¹ = 1802189111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1802189111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3505948 + ... + 3506461.

It is an arithmetic number, because the mean of its divisors is an integer number (452300445).

Almost surely, 2^1802189113 is an apocalyptic number.

It is an amenable number.

1802189113 is a deficient number, since it is larger than the sum of its proper divisors (7012667).

1802189113 is an equidigital number, since it uses as much as digits as its factorization.

1802189113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7012666.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 1802189113 is about 42452.1979760766. The cubic root of 1802189113 is about 1216.9333336875.

The spelling of 1802189113 in words is "one billion, eight hundred two million, one hundred eighty-nine thousand, one hundred thirteen".