20936960 has 72 divisors (see below), whose sum is σ = 54746496. Its totient is φ = 7608320.

The previous prime is 20936947. The next prime is 20937017. The reversal of 20936960 is 6963902.

It is a self number, because there is not a number n which added to its sum of digits gives 20936960.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13337 + ... + 14823.

It is an arithmetic number, because the mean of its divisors is an integer number (760368).

Almost surely, 2^20936960 is an apocalyptic number.

20936960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20936960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27373248).

20936960 is an abundant number, since it is smaller than the sum of its proper divisors (33809536).

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

20936960 is a wasteful number, since it uses less digits than its factorization.

20936960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519 (or 1505 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 20936960 is about 4575.6922973469. The cubic root of 20936960 is about 275.6160733462.

The spelling of 20936960 in words is "twenty million, nine hundred thirty-six thousand, nine hundred sixty".