20300020434 has 12 divisors (see below), whose sum is σ = 43983377646. Its totient is φ = 6766673472.

The previous prime is 20300020423. The next prime is 20300020459. The reversal of 20300020434 is 43402000302.

It can be written as a sum of positive squares in only one way, i.e., 12790931409 + 7509089025 = 113097^2 + 86655^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1127778913 = 20300020434 / (2 + 0 + 3 + 0 + 0 + 0 + 2 + 0 + 4 + 3 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 563889439 + ... + 563889474.

Almost surely, 2^20300020434 is an apocalyptic number.

20300020434 is an abundant number, since it is smaller than the sum of its proper divisors (23683357212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20300020434 is a wasteful number, since it uses less digits than its factorization.

20300020434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127778921 (or 1127778918 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 20300020434 its reverse (43402000302), we get a palindrome (63702020736).

The spelling of 20300020434 in words is "twenty billion, three hundred million, twenty thousand, four hundred thirty-four".