20011011 has 8 divisors (see below), whose sum is σ = 26702160. Its totient is φ = 13330272.

The previous prime is 20011007. The next prime is 20011031. The reversal of 20011011 is 11011002.

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

It is not a de Polignac number, because 20011011 - 2² = 20011007 is a prime.

It is a super-2 number, since 2×20011011² = 800881122484242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20011001) 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, 5425 + ... + 8333.

It is an arithmetic number, because the mean of its divisors is an integer number (3337770).

Almost surely, 2^20011011 is an apocalyptic number.

20011011 is a deficient number, since it is larger than the sum of its proper divisors (6691149).

20011011 is a wasteful number, since it uses less digits than its factorization.

20011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5205.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 20011011 is about 4473.3668528302. The cubic root of 20011011 is about 271.4915666079.

Adding to 20011011 its reverse (11011002), we get a palindrome (31022013).

Subtracting from 20011011 its reverse (11011002), we obtain a palindrome (9000009).

Multiplying 20011011 by its reverse (11011002), we get a palindrome (220341282143022).

It can be divided in two parts, 200 and 11011, that added together give a palindrome (11211).

The spelling of 20011011 in words is "twenty million, eleven thousand, eleven".