20568151 has 2 divisors, whose sum is σ = 20568152. Its totient is φ = 20568150.

The previous prime is 20568137. The next prime is 20568193. The reversal of 20568151 is 15186502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20568151 - 2⁹ = 20567639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20568131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10284075 + 10284076.

It is an arithmetic number, because the mean of its divisors is an integer number (10284076).

Almost surely, 2^20568151 is an apocalyptic number.

20568151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20568151 is an equidigital number, since it uses as much as digits as its factorization.

20568151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 20568151 is about 4535.2123434300. The cubic root of 20568151 is about 273.9881315121.

The spelling of 20568151 in words is "twenty million, five hundred sixty-eight thousand, one hundred fifty-one".