20900011 has 8 divisors (see below), whose sum is σ = 22891824. Its totient is φ = 18923520.

The previous prime is 20899993. The next prime is 20900051. The reversal of 20900011 is 11000902.

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

It is not a de Polignac number, because 20900011 - 2⁵ = 20899979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20899964 and 20900000.

It is not an unprimeable number, because it can be changed into a prime (20900051) 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, 870 + ... + 6523.

It is an arithmetic number, because the mean of its divisors is an integer number (2861478).

Almost surely, 2^20900011 is an apocalyptic number.

20900011 is a deficient number, since it is larger than the sum of its proper divisors (1991813).

20900011 is a wasteful number, since it uses less digits than its factorization.

20900011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7661.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 20900011 is about 4571.6529833311. The cubic root of 20900011 is about 275.4538445279.

Adding to 20900011 its reverse (11000902), we get a palindrome (31900913).

The spelling of 20900011 in words is "twenty million, nine hundred thousand, eleven".