20965608 has 64 divisors (see below), whose sum is σ = 60264000. Its totient is φ = 6745536.

The previous prime is 20965603. The next prime is 20965621. The reversal of 20965608 is 80656902.

20965608 is a `hidden beast` number, since 2 + 0 + 96 + 560 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20965601) 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, 4591 + ... + 7937.

It is an arithmetic number, because the mean of its divisors is an integer number (941625).

Almost surely, 2^20965608 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 20965608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30132000).

20965608 is an abundant number, since it is smaller than the sum of its proper divisors (39298392).

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

20965608 is a wasteful number, since it uses less digits than its factorization.

20965608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391 (or 3381 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 20965608 is about 4578.8216824856. The cubic root of 20965608 is about 275.7417243594.

The spelling of 20965608 in words is "twenty million, nine hundred sixty-five thousand, six hundred eight".