20745360 has 60 divisors (see below), whose sum is σ = 69672252. Its totient is φ = 5531904.

The previous prime is 20745343. The next prime is 20745421. The reversal of 20745360 is 6354702.

It is a happy number.

20745360 is a `hidden beast` number, since 207 + 453 + 6 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5253264 + 15492096 = 2292^2 + 3936^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13687 + ... + 15126.

Almost surely, 2^20745360 is an apocalyptic number.

20745360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20745360 is an abundant number, since it is smaller than the sum of its proper divisors (48926892).

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

20745360 is a wasteful number, since it uses less digits than its factorization.

20745360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28832 (or 28823 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20745360 is about 4554.7074549306. The cubic root of 20745360 is about 274.7727488979.

The spelling of 20745360 in words is "twenty million, seven hundred forty-five thousand, three hundred sixty".