20210011 has 4 divisors (see below), whose sum is σ = 20246472. Its totient is φ = 20173552.

The previous prime is 20209993. The next prime is 20210023. The reversal of 20210011 is 11001202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20210011 - 2⁷ = 20209883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20209976 and 20210003.

It is not an unprimeable number, because it can be changed into a prime (20219011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17386 + ... + 18511.

It is an arithmetic number, because the mean of its divisors is an integer number (5061618).

Almost surely, 2^20210011 is an apocalyptic number.

20210011 is a deficient number, since it is larger than the sum of its proper divisors (36461).

20210011 is an equidigital number, since it uses as much as digits as its factorization.

20210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36460.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 20210011 is about 4495.5545820288. The cubic root of 20210011 is about 272.3885513447.

Adding to 20210011 its reverse (11001202), we get a palindrome (31211213).

The spelling of 20210011 in words is "twenty million, two hundred ten thousand, eleven".