20971360 has 24 divisors (see below), whose sum is σ = 49545216. Its totient is φ = 8388480.

The previous prime is 20971297. The next prime is 20971381. The reversal of 20971360 is 6317902.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65376 + ... + 65695.

It is an arithmetic number, because the mean of its divisors is an integer number (2064384).

Almost surely, 2^20971360 is an apocalyptic number.

20971360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20971360 is an abundant number, since it is smaller than the sum of its proper divisors (28573856).

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

20971360 is a wasteful number, since it uses less digits than its factorization.

20971360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131086 (or 131078 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 20971360 is about 4579.4497486052. The cubic root of 20971360 is about 275.7669390089.

The spelling of 20971360 in words is "twenty million, nine hundred seventy-one thousand, three hundred sixty".