201838423 has 4 divisors (see below), whose sum is σ = 201867688. Its totient is φ = 201809160.

The previous prime is 201838421. The next prime is 201838451. The reversal of 201838423 is 324838102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 201838423 - 2¹ = 201838421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201838421) 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, 2065 + ... + 20197.

It is an arithmetic number, because the mean of its divisors is an integer number (50466922).

Almost surely, 2^201838423 is an apocalyptic number.

201838423 is a deficient number, since it is larger than the sum of its proper divisors (29265).

201838423 is a wasteful number, since it uses less digits than its factorization.

201838423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29264.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 201838423 is about 14206.9850073828. The cubic root of 201838423 is about 586.5899456678.

The spelling of 201838423 in words is "two hundred one million, eight hundred thirty-eight thousand, four hundred twenty-three".