20000101820 has 24 divisors (see below), whose sum is σ = 42009163728. Its totient is φ = 7998336000.

The previous prime is 20000101813. The next prime is 20000101829. The reversal of 20000101820 is 2810100002.

It is a junction number, because it is equal to n+sod(n) for n = 20000101795 and 20000101804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000101829) 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, 8126 + ... + 200165.

It is an arithmetic number, because the mean of its divisors is an integer number (1750381822).

Almost surely, 2^20000101820 is an apocalyptic number.

20000101820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000101820 is an abundant number, since it is smaller than the sum of its proper divisors (22009061908).

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

20000101820 is a wasteful number, since it uses less digits than its factorization.

20000101820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213101 (or 213099 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20000101820 its reverse (2810100002), we get a palindrome (22810201822).

The spelling of 20000101820 in words is "twenty billion, one hundred one thousand, eight hundred twenty".