20001323434442 has 16 divisors (see below), whose sum is σ = 34367170068672. Its totient is φ = 8552198998080.

The previous prime is 20001323434439. The next prime is 20001323434493. The reversal of 20001323434442 is 24443432310002.

It is a junction number, because it is equal to n+sod(n) for n = 20001323434399 and 20001323434408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1649723684 + ... + 1649735807.

It is an arithmetic number, because the mean of its divisors is an integer number (2147948129292).

Almost surely, 2^{20001323434442} is an apocalyptic number.

20001323434442 is a deficient number, since it is larger than the sum of its proper divisors (14365846634230).

20001323434442 is a wasteful number, since it uses less digits than its factorization.

20001323434442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299459933.

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 20001323434442 its reverse (24443432310002), we get a palindrome (44444755744444).

The spelling of 20001323434442 in words is "twenty trillion, one billion, three hundred twenty-three million, four hundred thirty-four thousand, four hundred forty-two".