20020012009 has 8 divisors (see below), whose sum is σ = 20669852160. Its totient is φ = 19370424000.

The previous prime is 20020011997. The next prime is 20020012013. The reversal of 20020012009 is 90021002002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020012009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020011983 and 20020012001.

It is not an unprimeable number, because it can be changed into a prime (20020012109) 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, 105537 + ... + 226225.

It is an arithmetic number, because the mean of its divisors is an integer number (2583731520).

Almost surely, 2^20020012009 is an apocalyptic number.

It is an amenable number.

20020012009 is a deficient number, since it is larger than the sum of its proper divisors (649840151).

20020012009 is a wasteful number, since it uses less digits than its factorization.

20020012009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126071.

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

The spelling of 20020012009 in words is "twenty billion, twenty million, twelve thousand, nine".