20765573 has 8 divisors (see below), whose sum is σ = 21783168. Its totient is φ = 19757584.

The previous prime is 20765561. The next prime is 20765599. The reversal of 20765573 is 37556702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20765573 - 2⁶ = 20765509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20765513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240 + ... + 6822.

It is an arithmetic number, because the mean of its divisors is an integer number (2722896).

Almost surely, 2^20765573 is an apocalyptic number.

20765573 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20765573 is a deficient number, since it is larger than the sum of its proper divisors (1017595).

20765573 is a wasteful number, since it uses less digits than its factorization.

20765573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803.

The product of its (nonzero) digits is 44100, while the sum is 35.

The square root of 20765573 is about 4556.9258277922. The cubic root of 20765573 is about 274.8619604731.

The spelling of 20765573 in words is "twenty million, seven hundred sixty-five thousand, five hundred seventy-three".