20011331001 has 16 divisors (see below), whose sum is σ = 26947681280. Its totient is φ = 13208000400.

The previous prime is 20011330991. The next prime is 20011331003. The reversal of 20011331001 is 10013311002.

It is not a de Polignac number, because 20011331001 - 2¹⁰ = 20011329977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011331003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1988340 + ... + 1998378.

It is an arithmetic number, because the mean of its divisors is an integer number (1684230080).

Almost surely, 2^20011331001 is an apocalyptic number.

It is an amenable number.

20011331001 is a deficient number, since it is larger than the sum of its proper divisors (6936350279).

20011331001 is a wasteful number, since it uses less digits than its factorization.

20011331001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16596.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 20011331001 its reverse (10013311002), we get a palindrome (30024642003).

The spelling of 20011331001 in words is "twenty billion, eleven million, three hundred thirty-one thousand, one".