20187151 has 2 divisors, whose sum is σ = 20187152. Its totient is φ = 20187150.

The previous prime is 20187137. The next prime is 20187191. The reversal of 20187151 is 15178102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20187151 - 2⁵ = 20187119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20187121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10093575 + 10093576.

It is an arithmetic number, because the mean of its divisors is an integer number (10093576).

Almost surely, 2^20187151 is an apocalyptic number.

20187151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20187151 is an equidigital number, since it uses as much as digits as its factorization.

20187151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 20187151 is about 4493.0113509761. The cubic root of 20187151 is about 272.2858109831.

The spelling of 20187151 in words is "twenty million, one hundred eighty-seven thousand, one hundred fifty-one".