20111016 has 32 divisors (see below), whose sum is σ = 52464960. Its totient is φ = 6412032.

The previous prime is 20111011. The next prime is 20111023. The reversal of 20111016 is 61011102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20110992 and 20111010.

It is not an unprimeable number, because it can be changed into a prime (20111011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17665 + ... + 18768.

It is an arithmetic number, because the mean of its divisors is an integer number (1639530).

Almost surely, 2^20111016 is an apocalyptic number.

It is an amenable number.

20111016 is an abundant number, since it is smaller than the sum of its proper divisors (32353944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111016 is a wasteful number, since it uses less digits than its factorization.

20111016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36465 (or 36461 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 20111016 is about 4484.5307446822. The cubic root of 20111016 is about 271.9430748809.

Adding to 20111016 its reverse (61011102), we get a palindrome (81122118).

The spelling of 20111016 in words is "twenty million, one hundred eleven thousand, sixteen".