20745361 has 16 divisors (see below), whose sum is σ = 25656064. Its totient is φ = 16334784.

The previous prime is 20745343. The next prime is 20745421. The reversal of 20745361 is 16354702.

It is a cyclic number.

It is not a de Polignac number, because 20745361 - 2⁷ = 20745233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20745301) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 24796 + ... + 25618.

It is an arithmetic number, because the mean of its divisors is an integer number (1603504).

Almost surely, 2^20745361 is an apocalyptic number.

It is an amenable number.

20745361 is a deficient number, since it is larger than the sum of its proper divisors (4910703).

20745361 is a wasteful number, since it uses less digits than its factorization.

20745361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20745361 is about 4554.7075647071. The cubic root of 20745361 is about 274.7727533129.

The spelling of 20745361 in words is "twenty million, seven hundred forty-five thousand, three hundred sixty-one".