20003555412443 has 32 divisors (see below), whose sum is σ = 21030395904000. Its totient is φ = 18990352260000.

The previous prime is 20003555412437. The next prime is 20003555412481. The reversal of 20003555412443 is 34421455530002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003555412443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003555412397 and 20003555412406.

It is not an unprimeable number, because it can be changed into a prime (20003555412403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3502633358 + ... + 3502639068.

It is an arithmetic number, because the mean of its divisors is an integer number (657199872000).

Almost surely, 2^{20003555412443} is an apocalyptic number.

20003555412443 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20003555412443 is a deficient number, since it is larger than the sum of its proper divisors (1026840491557).

20003555412443 is a wasteful number, since it uses less digits than its factorization.

20003555412443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7703.

The product of its (nonzero) digits is 288000, while the sum is 38.

The spelling of 20003555412443 in words is "twenty trillion, three billion, five hundred fifty-five million, four hundred twelve thousand, four hundred forty-three".