20580757 has 4 divisors (see below), whose sum is σ = 20728960. Its totient is φ = 20432556.

The previous prime is 20580751. The next prime is 20580767. The reversal of 20580757 is 75708502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20580757 - 2¹¹ = 20578709 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 (20580751) 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 3 ways as a sum of consecutive naturals, for example, 73893 + ... + 74170.

It is an arithmetic number, because the mean of its divisors is an integer number (5182240).

Almost surely, 2^20580757 is an apocalyptic number.

It is an amenable number.

20580757 is a deficient number, since it is larger than the sum of its proper divisors (148203).

20580757 is a wasteful number, since it uses less digits than its factorization.

20580757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148202.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 20580757 is about 4536.6019221439. The cubic root of 20580757 is about 274.0440948801.

The spelling of 20580757 in words is "twenty million, five hundred eighty thousand, seven hundred fifty-seven".