203812018 has 4 divisors (see below), whose sum is σ = 305718030. Its totient is φ = 101906008.

The previous prime is 203812009. The next prime is 203812093. The reversal of 203812018 is 810218302.

203812018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 153586449 + 50225569 = 12393^2 + 7087^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203811983 and 203812001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50953003 + ... + 50953006.

Almost surely, 2^203812018 is an apocalyptic number.

203812018 is a deficient number, since it is larger than the sum of its proper divisors (101906012).

203812018 is a wasteful number, since it uses less digits than its factorization.

203812018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101906011.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 203812018 is about 14276.2746541246. The cubic root of 203812018 is about 588.4956581594.

The spelling of 203812018 in words is "two hundred three million, eight hundred twelve thousand, eighteen".