20588251 has 2 divisors, whose sum is σ = 20588252. Its totient is φ = 20588250.

The previous prime is 20588213. The next prime is 20588257. The reversal of 20588251 is 15288502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20588251 - 2²³ = 12199643 is a prime.

It is not a weakly prime, because it can be changed into another prime (20588257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10294125 + 10294126.

It is an arithmetic number, because the mean of its divisors is an integer number (10294126).

Almost surely, 2^20588251 is an apocalyptic number.

20588251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20588251 is an equidigital number, since it uses as much as digits as its factorization.

20588251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 20588251 is about 4537.4277955688. The cubic root of 20588251 is about 274.0773530871.

The spelling of 20588251 in words is "twenty million, five hundred eighty-eight thousand, two hundred fifty-one".