20001022001009 has 16 divisors (see below), whose sum is σ = 23115408825600. Its totient is φ = 16950914052864.

The previous prime is 20001022000937. The next prime is 20001022001017. The reversal of 20001022001009 is 90010022010002.

It is a cyclic number.

It is not a de Polignac number, because 20001022001009 - 2⁸ = 20001022000753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001022001209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91602164 + ... + 91820250.

It is an arithmetic number, because the mean of its divisors is an integer number (1444713051600).

Almost surely, 2^{20001022001009} is an apocalyptic number.

It is an amenable number.

20001022001009 is a deficient number, since it is larger than the sum of its proper divisors (3114386824591).

20001022001009 is a wasteful number, since it uses less digits than its factorization.

20001022001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365392.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 20001022001009 in words is "twenty trillion, one billion, twenty-two million, one thousand, nine".