20204243434 has 8 divisors (see below), whose sum is σ = 30721521060. Its totient is φ = 9963736416.

The previous prime is 20204243431. The next prime is 20204243513. The reversal of 20204243434 is 43434240202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18070080625 + 2134162809 = 134425^2 + 46197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20204243434² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20204243431) 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, 69192469 + ... + 69192760.

Almost surely, 2^20204243434 is an apocalyptic number.

20204243434 is a deficient number, since it is larger than the sum of its proper divisors (10517277626).

20204243434 is a wasteful number, since it uses less digits than its factorization.

20204243434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138385304.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 20204243434 its reverse (43434240202), we get a palindrome (63638483636).

The spelling of 20204243434 in words is "twenty billion, two hundred four million, two hundred forty-three thousand, four hundred thirty-four".