20129204702834 has 8 divisors (see below), whose sum is σ = 30193971631068. Its totient is φ = 10064547492480.

The previous prime is 20129204702819. The next prime is 20129204702839. The reversal of 20129204702834 is 43820740292102.

It can be written as a sum of positive squares in 2 ways, for example, as 20127758041609 + 1446661225 = 4486397^2 + 38035^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20129204702839) 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, 26969267 + ... + 27705590.

Almost surely, 2^{20129204702834} is an apocalyptic number.

20129204702834 is a deficient number, since it is larger than the sum of its proper divisors (10064766928234).

20129204702834 is a wasteful number, since it uses less digits than its factorization.

20129204702834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54858940.

The product of its (nonzero) digits is 387072, while the sum is 44.

Adding to 20129204702834 its reverse (43820740292102), we get a palindrome (63949944994936).

The spelling of 20129204702834 in words is "twenty trillion, one hundred twenty-nine billion, two hundred four million, seven hundred two thousand, eight hundred thirty-four".