202003423 has 4 divisors (see below), whose sum is σ = 202062688. Its totient is φ = 201944160.

The previous prime is 202003393. The next prime is 202003429. The reversal of 202003423 is 324300202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324300202 = 2 ⋅162150101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202003423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202003397 and 202003406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202003429) 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, 24186 + ... + 31447.

It is an arithmetic number, because the mean of its divisors is an integer number (50515672).

Almost surely, 2^202003423 is an apocalyptic number.

202003423 is a deficient number, since it is larger than the sum of its proper divisors (59265).

202003423 is an equidigital number, since it uses as much as digits as its factorization.

202003423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59264.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 202003423 is about 14212.7908237615. The cubic root of 202003423 is about 586.7497450715.

Adding to 202003423 its reverse (324300202), we get a palindrome (526303625).

The spelling of 202003423 in words is "two hundred two million, three thousand, four hundred twenty-three".