20404344434 has 8 divisors (see below), whose sum is σ = 31318296240. Its totient is φ = 9964912356.

The previous prime is 20404344421. The next prime is 20404344437. The reversal of 20404344434 is 43444340402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20404344434.

It is not an unprimeable number, because it can be changed into a prime (20404344437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118629824 + ... + 118629995.

It is an arithmetic number, because the mean of its divisors is an integer number (3914787030).

Almost surely, 2^20404344434 is an apocalyptic number.

20404344434 is a deficient number, since it is larger than the sum of its proper divisors (10913951806).

20404344434 is a wasteful number, since it uses less digits than its factorization.

20404344434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237259864.

The product of its (nonzero) digits is 73728, while the sum is 32.

Adding to 20404344434 its reverse (43444340402), we get a palindrome (63848684836).

The spelling of 20404344434 in words is "twenty billion, four hundred four million, three hundred forty-four thousand, four hundred thirty-four".