18959238 has 16 divisors (see below), whose sum is σ = 42131760. Its totient is φ = 6319728.

The previous prime is 18959231. The next prime is 18959251. The reversal of 18959238 is 83295981.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18959193 and 18959202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18959231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175495 + ... + 175602.

It is an arithmetic number, because the mean of its divisors is an integer number (2633235).

Almost surely, 2^18959238 is an apocalyptic number.

18959238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18959238 is an abundant number, since it is smaller than the sum of its proper divisors (23172522).

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

18959238 is a wasteful number, since it uses less digits than its factorization.

18959238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351108 (or 351102 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 18959238 is about 4354.2207109884. The cubic root of 18959238 is about 266.6492047594.

The spelling of 18959238 in words is "eighteen million, nine hundred fifty-nine thousand, two hundred thirty-eight".