20305034234 has 4 divisors (see below), whose sum is σ = 30457551354. Its totient is φ = 10152517116.

The previous prime is 20305034231. The next prime is 20305034251. The reversal of 20305034234 is 43243050302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15320250625 + 4984783609 = 123775^2 + 70603^2 .

It is not an unprimeable number, because it can be changed into a prime (20305034231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5076258557 + ... + 5076258560.

Almost surely, 2^20305034234 is an apocalyptic number.

20305034234 is a deficient number, since it is larger than the sum of its proper divisors (10152517120).

20305034234 is a wasteful number, since it uses less digits than its factorization.

20305034234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10152517119.

The product of its (nonzero) digits is 8640, while the sum is 26.

Adding to 20305034234 its reverse (43243050302), we get a palindrome (63548084536).

The spelling of 20305034234 in words is "twenty billion, three hundred five million, thirty-four thousand, two hundred thirty-four".