20001240434 has 16 divisors (see below), whose sum is σ = 35470180800. Its totient is φ = 8276375184.

The previous prime is 20001240431. The next prime is 20001240443. The reversal of 20001240434 is 43404210002.

It is not an unprimeable number, because it can be changed into a prime (20001240431) 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, 24631664 + ... + 24632475.

It is an arithmetic number, because the mean of its divisors is an integer number (2216886300).

Almost surely, 2^20001240434 is an apocalyptic number.

20001240434 is a deficient number, since it is larger than the sum of its proper divisors (15468940366).

20001240434 is a wasteful number, since it uses less digits than its factorization.

20001240434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49264177.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20001240434 its reverse (43404210002), we get a palindrome (63405450436).

The spelling of 20001240434 in words is "twenty billion, one million, two hundred forty thousand, four hundred thirty-four".