20963016 has 128 divisors (see below), whose sum is σ = 62198400. Its totient is φ = 6531840.

The previous prime is 20963011. The next prime is 20963017. The reversal of 20963016 is 61036902.

It is a happy number.

20963016 is a `hidden beast` number, since 20 + 9 + 630 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20963011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 343626 + ... + 343686.

It is an arithmetic number, because the mean of its divisors is an integer number (485925).

Almost surely, 2^20963016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20963016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31099200).

20963016 is an abundant number, since it is smaller than the sum of its proper divisors (41235384).

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

20963016 is a wasteful number, since it uses less digits than its factorization.

20963016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 20963016 is about 4578.5386314849. The cubic root of 20963016 is about 275.7303604787.

Adding to 20963016 its reverse (61036902), we get a palindrome (81999918).

The spelling of 20963016 in words is "twenty million, nine hundred sixty-three thousand, sixteen".