20586157 has 4 divisors (see below), whose sum is σ = 20628576. Its totient is φ = 20543740.

The previous prime is 20586151. The next prime is 20586161. The reversal of 20586157 is 75168502.

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 20586157 - 2³ = 20586149 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 (20586151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20473 + ... + 21454.

It is an arithmetic number, because the mean of its divisors is an integer number (5157144).

Almost surely, 2^20586157 is an apocalyptic number.

It is an amenable number.

20586157 is a deficient number, since it is larger than the sum of its proper divisors (42419).

20586157 is an equidigital number, since it uses as much as digits as its factorization.

20586157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42418.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 20586157 is about 4537.1970422277. The cubic root of 20586157 is about 274.0680607738.

The spelling of 20586157 in words is "twenty million, five hundred eighty-six thousand, one hundred fifty-seven".