201600018 has 12 divisors (see below), whose sum is σ = 436800078. Its totient is φ = 67200000.

The previous prime is 201600017. The next prime is 201600019. The reversal of 201600018 is 810006102.

It is an interprime number because it is at equal distance from previous prime (201600017) and next prime (201600019).

It can be written as a sum of positive squares in only one way, i.e., 161112249 + 40487769 = 12693^2 + 6363^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11200001 = 201600018 / (2 + 0 + 1 + 6 + 0 + 0 + 0 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (201600011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5599983 + ... + 5600018.

Almost surely, 2^201600018 is an apocalyptic number.

201600018 is an abundant number, since it is smaller than the sum of its proper divisors (235200060).

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

201600018 is a wasteful number, since it uses less digits than its factorization.

201600018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11200009 (or 11200006 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 201600018 is about 14198.5921133048. The cubic root of 201600018 is about 586.3589010025.

The spelling of 201600018 in words is "two hundred one million, six hundred thousand, eighteen".