20203340434 has 4 divisors (see below), whose sum is σ = 30305010654. Its totient is φ = 10101670216.

The previous prime is 20203340431. The next prime is 20203340453. The reversal of 20203340434 is 43404330202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43404330202 = 2 ⋅21702165101.

It can be written as a sum of positive squares in only one way, i.e., 16142464809 + 4060875625 = 127053^2 + 63725^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20203340399 and 20203340408.

It is not an unprimeable number, because it can be changed into a prime (20203340431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050835107 + ... + 5050835110.

Almost surely, 2^20203340434 is an apocalyptic number.

20203340434 is a deficient number, since it is larger than the sum of its proper divisors (10101670220).

20203340434 is a wasteful number, since it uses less digits than its factorization.

20203340434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101670219.

The product of its (nonzero) digits is 6912, while the sum is 25.

Adding to 20203340434 its reverse (43404330202), we get a palindrome (63607670636).

The spelling of 20203340434 in words is "twenty billion, two hundred three million, three hundred forty thousand, four hundred thirty-four".