20320220011 has 16 divisors (see below), whose sum is σ = 25033192128. Its totient is φ = 16062307200.

The previous prime is 20320220009. The next prime is 20320220017. The reversal of 20320220011 is 11002202302.

It is a cyclic number.

It is not a de Polignac number, because 20320220011 - 2¹ = 20320220009 is a prime.

It is a super-2 number, since 2×20320220011² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20320219973 and 20320220000.

It is not an unprimeable number, because it can be changed into a prime (20320220017) 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, 8680 + ... + 201781.

It is an arithmetic number, because the mean of its divisors is an integer number (1564574508).

Almost surely, 2^20320220011 is an apocalyptic number.

20320220011 is a deficient number, since it is larger than the sum of its proper divisors (4712972117).

20320220011 is a wasteful number, since it uses less digits than its factorization.

20320220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211542.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20320220011 its reverse (11002202302), we get a palindrome (31322422313).

The spelling of 20320220011 in words is "twenty billion, three hundred twenty million, two hundred twenty thousand, eleven".