202423443434 has 4 divisors (see below), whose sum is σ = 303635165154. Its totient is φ = 101211721716.

The previous prime is 202423443419. The next prime is 202423443473. The reversal of 202423443434 is 434344324202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434344324202 = 2 ⋅217172162101.

It can be written as a sum of positive squares in only one way, i.e., 154412060209 + 48011383225 = 392953^2 + 219115^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202423443394 and 202423443403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605860857 + ... + 50605860860.

Almost surely, 2^202423443434 is an apocalyptic number.

202423443434 is a deficient number, since it is larger than the sum of its proper divisors (101211721720).

202423443434 is a wasteful number, since it uses less digits than its factorization.

202423443434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101211721719.

The product of its (nonzero) digits is 221184, while the sum is 35.

Adding to 202423443434 its reverse (434344324202), we get a palindrome (636767767636).

The spelling of 202423443434 in words is "two hundred two billion, four hundred twenty-three million, four hundred forty-three thousand, four hundred thirty-four".