20511114 has 32 divisors (see below), whose sum is σ = 44936640. Its totient is φ = 6202752.

The previous prime is 20511109. The next prime is 20511131. The reversal of 20511114 is 41111502.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20511093 and 20511102.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2374 + ... + 6830.

It is an arithmetic number, because the mean of its divisors is an integer number (1404270).

Almost surely, 2^20511114 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20511114, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22468320).

20511114 is an abundant number, since it is smaller than the sum of its proper divisors (24425526).

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

20511114 is a wasteful number, since it uses less digits than its factorization.

20511114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 20511114 is about 4528.9197387457. The cubic root of 20511114 is about 273.7346339449.

Adding to 20511114 its reverse (41111502), we get a palindrome (61622616).

The spelling of 20511114 in words is "twenty million, five hundred eleven thousand, one hundred fourteen".