20001100002 has 32 divisors (see below), whose sum is σ = 43091442240. Its totient is φ = 6152448960.

The previous prime is 20001100001. The next prime is 20001100003. The reversal of 20001100002 is 20000110002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20001100001) and next prime (20001100003).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is not an unprimeable number, because it can be changed into a prime (20001100001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257352 + ... + 325932.

It is an arithmetic number, because the mean of its divisors is an integer number (1346607570).

Almost surely, 2^20001100002 is an apocalyptic number.

20001100002 is an abundant number, since it is smaller than the sum of its proper divisors (23090342238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001100002 is a wasteful number, since it uses less digits than its factorization.

20001100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72338.

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 20001100002 its reverse (20000110002), we get a palindrome (40001210004).

It can be divided in two parts, 2000110000 and 2, that added together give a palindrome (2000110002).

The spelling of 20001100002 in words is "twenty billion, one million, one hundred thousand, two".