20020011 has 16 divisors (see below), whose sum is σ = 29248128. Its totient is φ = 12080000.

The previous prime is 20020001. The next prime is 20020019. The reversal of 20020011 is 11002002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20020011 - 2¹⁸ = 19757867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20020019) 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, 7075 + ... + 9491.

It is an arithmetic number, because the mean of its divisors is an integer number (1828008).

Almost surely, 2^20020011 is an apocalyptic number.

20020011 is a deficient number, since it is larger than the sum of its proper divisors (9228117).

20020011 is a wasteful number, since it uses less digits than its factorization.

20020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 20020011 is about 4474.3726934622. The cubic root of 20020011 is about 271.5322618344.

Adding to 20020011 its reverse (11002002), we get a palindrome (31022013).

Subtracting from 20020011 its reverse (11002002), we obtain a square (9018009 = 3003²).

It can be divided in two parts, 2002001 and 1, that added together give a palindrome (2002002).

The spelling of 20020011 in words is "twenty million, twenty thousand, eleven".