20043491633 has 16 divisors (see below), whose sum is σ = 22141728000. Its totient is φ = 17991524880.

The previous prime is 20043491603. The next prime is 20043491669. The reversal of 20043491633 is 33619434002.

It is not a de Polignac number, because 20043491633 - 2¹⁸ = 20043229489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20043491593 and 20043491602.

It is not an unprimeable number, because it can be changed into a prime (20043491603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1911158 + ... + 1921616.

It is an arithmetic number, because the mean of its divisors is an integer number (1383858000).

Almost surely, 2^20043491633 is an apocalyptic number.

It is an amenable number.

20043491633 is a deficient number, since it is larger than the sum of its proper divisors (2098236367).

20043491633 is a wasteful number, since it uses less digits than its factorization.

20043491633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12652.

The product of its (nonzero) digits is 46656, while the sum is 35.

The spelling of 20043491633 in words is "twenty billion, forty-three million, four hundred ninety-one thousand, six hundred thirty-three".