20003203120021 has 8 divisors (see below), whose sum is σ = 21842478504000. Its totient is φ = 18167394798240.

The previous prime is 20003203119989. The next prime is 20003203120031. The reversal of 20003203120021 is 12002130230002.

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

It is a cyclic number.

It is not a de Polignac number, because 20003203120021 - 2⁵ = 20003203119989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20003203119977 and 20003203120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003203120031) 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, 866753481 + ... + 866776558.

It is an arithmetic number, because the mean of its divisors is an integer number (2730309813000).

Almost surely, 2^{20003203120021} is an apocalyptic number.

It is an amenable number.

20003203120021 is a deficient number, since it is larger than the sum of its proper divisors (1839275383979).

20003203120021 is a wasteful number, since it uses less digits than its factorization.

20003203120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733531099.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20003203120021 its reverse (12002130230002), we get a palindrome (32005333350023).

The spelling of 20003203120021 in words is "twenty trillion, three billion, two hundred three million, one hundred twenty thousand, twenty-one".