20303431434 has 96 divisors (see below), whose sum is σ = 53408416320. Its totient is φ = 5679257760.

The previous prime is 20303431429. The next prime is 20303431451. The reversal of 20303431434 is 43413430302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20303431398 and 20303431407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34572 + ... + 204455.

It is an arithmetic number, because the mean of its divisors is an integer number (556337670).

Almost surely, 2^20303431434 is an apocalyptic number.

20303431434 is an abundant number, since it is smaller than the sum of its proper divisors (33104984886).

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

20303431434 is a wasteful number, since it uses less digits than its factorization.

20303431434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239073 (or 239056 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 20303431434 its reverse (43413430302), we get a palindrome (63716861736).

The spelling of 20303431434 in words is "twenty billion, three hundred three million, four hundred thirty-one thousand, four hundred thirty-four".