18189203340 has 96 divisors (see below), whose sum is σ = 63496871424. Its totient is φ = 3779573760.

The previous prime is 18189203327. The next prime is 18189203353. The reversal of 18189203340 is 4330298181.

It is an interprime number because it is at equal distance from previous prime (18189203327) and next prime (18189203353).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1963909 + ... + 1973148.

It is an arithmetic number, because the mean of its divisors is an integer number (661425744).

Almost surely, 2^18189203340 is an apocalyptic number.

18189203340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18189203340 is an abundant number, since it is smaller than the sum of its proper divisors (45307668084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18189203340 is a wasteful number, since it uses less digits than its factorization.

18189203340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937087 (or 3937085 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 18189203340 in words is "eighteen billion, one hundred eighty-nine million, two hundred three thousand, three hundred forty".