20010010100 has 36 divisors (see below), whose sum is σ = 43438784844. Its totient is φ = 8000858880.

The previous prime is 20010010099. The next prime is 20010010199. The reversal of 20010010100 is 101001002.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2483427556 + 17526582544 = 49834^2 + 132388^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225302 + ... + 301298.

Almost surely, 2^20010010100 is an apocalyptic number.

20010010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010010100 is an abundant number, since it is smaller than the sum of its proper divisors (23428774744).

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

20010010100 is a wasteful number, since it uses less digits than its factorization.

20010010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78644 (or 78637 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 20010010100 its reverse (101001002), we get a palindrome (20111011102).

The spelling of 20010010100 in words is "twenty billion, ten million, ten thousand, one hundred".