10020020209 has 12 divisors (see below), whose sum is σ = 10468343284. Its totient is φ = 9583844832.

The previous prime is 10020020203. The next prime is 10020020239. The reversal of 10020020209 is 90202002001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8471361600 + 1548658609 = 92040^2 + 39353^2 .

It is not a de Polignac number, because 10020020209 - 2¹⁵ = 10019987441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10020020192 and 10020020201.

It is not an unprimeable number, because it can be changed into a prime (10020020203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89899 + ... + 167695.

Almost surely, 2^10020020209 is an apocalyptic number.

It is an amenable number.

10020020209 is a deficient number, since it is larger than the sum of its proper divisors (448323075).

10020020209 is an frugal number, since it uses more digits than its factorization.

10020020209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77952 (or 77893 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

It can be divided in two parts, 100200 and 20209, that added together give a square (120409 = 347²).

The spelling of 10020020209 in words is "ten billion, twenty million, twenty thousand, two hundred nine".