20003219993 has 4 divisors (see below), whose sum is σ = 20342257680. Its totient is φ = 19664182308.

The previous prime is 20003219981. The next prime is 20003220001. The reversal of 20003219993 is 39991230002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39991230002 = 2 ⋅19995615001.

It is a cyclic number.

It is not a de Polignac number, because 20003219993 - 2⁸ = 20003219737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003210993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169518755 + ... + 169518872.

It is an arithmetic number, because the mean of its divisors is an integer number (5085564420).

Almost surely, 2^20003219993 is an apocalyptic number.

It is an amenable number.

20003219993 is a deficient number, since it is larger than the sum of its proper divisors (339037687).

20003219993 is an equidigital number, since it uses as much as digits as its factorization.

20003219993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339037686.

The product of its (nonzero) digits is 26244, while the sum is 38.

Adding to 20003219993 its reverse (39991230002), we get a palindrome (59994449995).

The spelling of 20003219993 in words is "twenty billion, three million, two hundred nineteen thousand, nine hundred ninety-three".