20003554440043 has 8 divisors (see below), whose sum is σ = 20026002944160. Its totient is φ = 19981108465920.

The previous prime is 20003554440007. The next prime is 20003554440071. The reversal of 20003554440043 is 34004445530002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003554440043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003554439990 and 20003554440008.

It is not an unprimeable number, because it can be changed into a prime (20003554440073) 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, 15417723 + ... + 16664731.

It is an arithmetic number, because the mean of its divisors is an integer number (2503250368020).

Almost surely, 2^{20003554440043} is an apocalyptic number.

20003554440043 is a deficient number, since it is larger than the sum of its proper divisors (22448504117).

20003554440043 is a wasteful number, since it uses less digits than its factorization.

20003554440043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264997.

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 20003554440043 its reverse (34004445530002), we get a palindrome (54007999970045).

The spelling of 20003554440043 in words is "twenty trillion, three billion, five hundred fifty-four million, four hundred forty thousand, forty-three".