20002201993 has 8 divisors (see below), whose sum is σ = 20133876168. Its totient is φ = 19870959744.

The previous prime is 20002201963. The next prime is 20002202021. The reversal of 20002201993 is 39910220002.

It can be written as a sum of positive squares in 4 ways, for example, as 83960569 + 19918241424 = 9163^2 + 141132^2 .

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 20002201993 - 2⁹ = 20002201481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002201963) 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, 14796 + ... + 200557.

It is an arithmetic number, because the mean of its divisors is an integer number (2516734521).

Almost surely, 2^20002201993 is an apocalyptic number.

It is an amenable number.

20002201993 is a deficient number, since it is larger than the sum of its proper divisors (131674175).

20002201993 is a wasteful number, since it uses less digits than its factorization.

20002201993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215963.

The product of its (nonzero) digits is 1944, while the sum is 28.

Adding to 20002201993 its reverse (39910220002), we get a palindrome (59912421995).

The spelling of 20002201993 in words is "twenty billion, two million, two hundred one thousand, nine hundred ninety-three".