20013232033021 has 4 divisors (see below), whose sum is σ = 20016551533500. Its totient is φ = 20009912532544.

The previous prime is 20013232032971. The next prime is 20013232033033. The reversal of 20013232033021 is 12033023231002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17301565035225 + 2711666997796 = 4159515^2 + 1646714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013232033021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20013232032983 and 20013232033001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013232033621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1659741196 + ... + 1659753253.

It is an arithmetic number, because the mean of its divisors is an integer number (5004137883375).

Almost surely, 2^{20013232033021} is an apocalyptic number.

It is an amenable number.

20013232033021 is a deficient number, since it is larger than the sum of its proper divisors (3319500479).

20013232033021 is an equidigital number, since it uses as much as digits as its factorization.

20013232033021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319500478.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20013232033021 its reverse (12033023231002), we get a palindrome (32046255264023).

The spelling of 20013232033021 in words is "twenty trillion, thirteen billion, two hundred thirty-two million, thirty-three thousand, twenty-one".