20012102010 has 48 divisors (see below), whose sum is σ = 52567895016. Its totient is φ = 5281542144.

The previous prime is 20012101999. The next prime is 20012102017. The reversal of 20012102010 is 1020121002.

It can be written as a sum of positive squares in 4 ways, for example, as 19504636281 + 507465729 = 139659^2 + 22527^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20012101983 and 20012102001.

It is not an unprimeable number, because it can be changed into a prime (20012102017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1137439 + ... + 1154898.

Almost surely, 2^20012102010 is an apocalyptic number.

20012102010 is an abundant number, since it is smaller than the sum of its proper divisors (32555793006).

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

20012102010 is a wasteful number, since it uses less digits than its factorization.

20012102010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292447 (or 2292444 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20012102010 its reverse (1020121002), we get a palindrome (21032223012).

The spelling of 20012102010 in words is "twenty billion, twelve million, one hundred two thousand, ten".