20772016 has 20 divisors (see below), whose sum is σ = 42364600. Its totient is φ = 9839232.

The previous prime is 20771987. The next prime is 20772019. The reversal of 20772016 is 61027702.

It is not an unprimeable number, because it can be changed into a prime (20772019) 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 3 ways as a sum of consecutive naturals, for example, 33861 + ... + 34468.

It is an arithmetic number, because the mean of its divisors is an integer number (2118230).

Almost surely, 2^20772016 is an apocalyptic number.

20772016 is the 2883-rd centered pentagonal number.

It is an amenable number.

20772016 is an abundant number, since it is smaller than the sum of its proper divisors (21592584).

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

20772016 is a wasteful number, since it uses less digits than its factorization.

20772016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68356 (or 68350 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 20772016 is about 4557.6327188575. The cubic root of 20772016 is about 274.8903849634.

Adding to 20772016 its reverse (61027702), we get a palindrome (81799718).

The spelling of 20772016 in words is "twenty million, seven hundred seventy-two thousand, sixteen".