20636960 has 24 divisors (see below), whose sum is σ = 48755196. Its totient is φ = 8254720.

The previous prime is 20636953. The next prime is 20637011. The reversal of 20636960 is 6963602.

It can be written as a sum of positive squares in 2 ways, for example, as 18905104 + 1731856 = 4348^2 + 1316^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64331 + ... + 64650.

Almost surely, 2^20636960 is an apocalyptic number.

20636960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20636960 is an abundant number, since it is smaller than the sum of its proper divisors (28118236).

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

20636960 is a wasteful number, since it uses less digits than its factorization.

20636960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128996 (or 128988 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 20636960 is about 4542.7920929754. The cubic root of 20636960 is about 274.2933260950.

The spelling of 20636960 in words is "twenty million, six hundred thirty-six thousand, nine hundred sixty".