20022012011 has 4 divisors (see below), whose sum is σ = 20199198072. Its totient is φ = 19844825952.

The previous prime is 20022011963. The next prime is 20022012013. The reversal of 20022012011 is 11021022002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20022012011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20022011983 and 20022012001.

It is not an unprimeable number, because it can be changed into a prime (20022012013) 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, 88592861 + ... + 88593086.

It is an arithmetic number, because the mean of its divisors is an integer number (5049799518).

Almost surely, 2^20022012011 is an apocalyptic number.

20022012011 is a deficient number, since it is larger than the sum of its proper divisors (177186061).

20022012011 is a wasteful number, since it uses less digits than its factorization.

20022012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177186060.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20022012011 its reverse (11021022002), we get a palindrome (31043034013).

Subtracting from 20022012011 its reverse (11021022002), we obtain a palindrome (9000990009).

The spelling of 20022012011 in words is "twenty billion, twenty-two million, twelve thousand, eleven".