20011000100002 has 4 divisors (see below), whose sum is σ = 30016500150006. Its totient is φ = 10005500050000.

The previous prime is 20011000099999. The next prime is 20011000100009. The reversal of 20011000100002 is 20000100011002.

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

It can be written as a sum of positive squares in only one way, i.e., 15734462955561 + 4276537144441 = 3966669^2 + 2067979^2 .

It is not an unprimeable number, because it can be changed into a prime (20011000100009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002750024999 + ... + 5002750025002.

Almost surely, 2^{20011000100002} is an apocalyptic number.

20011000100002 is a deficient number, since it is larger than the sum of its proper divisors (10005500050004).

20011000100002 is a wasteful number, since it uses less digits than its factorization.

20011000100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005500050003.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20011000100002 its reverse (20000100011002), we get a palindrome (40011100111004).

The spelling of 20011000100002 in words is "twenty trillion, eleven billion, one hundred thousand, two".