20303040434 has 16 divisors (see below), whose sum is σ = 30813096600. Its totient is φ = 10032488064.

The previous prime is 20303040427. The next prime is 20303040437. The reversal of 20303040434 is 43404030302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17515728409 + 2787312025 = 132347^2 + 52795^2 .

It is not an unprimeable number, because it can be changed into a prime (20303040437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34907 + ... + 204510.

Almost surely, 2^20303040434 is an apocalyptic number.

20303040434 is a deficient number, since it is larger than the sum of its proper divisors (10510056166).

20303040434 is a wasteful number, since it uses less digits than its factorization.

20303040434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239917.

The product of its (nonzero) digits is 3456, while the sum is 23.

Adding to 20303040434 its reverse (43404030302), we get a palindrome (63707070736).

The spelling of 20303040434 in words is "twenty billion, three hundred three million, forty thousand, four hundred thirty-four".