20014187 has 2 divisors, whose sum is σ = 20014188. Its totient is φ = 20014186.

The previous prime is 20014171. The next prime is 20014199. The reversal of 20014187 is 78141002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20014187 - 2⁴ = 20014171 is a prime.

It is not a weakly prime, because it can be changed into another prime (20014987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007093 + 10007094.

It is an arithmetic number, because the mean of its divisors is an integer number (10007094).

Almost surely, 2^20014187 is an apocalyptic number.

20014187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20014187 is an equidigital number, since it uses as much as digits as its factorization.

20014187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20014187 is about 4473.7218286344. The cubic root of 20014187 is about 271.5059288941.

Adding to 20014187 its reverse (78141002), we get a palindrome (98155189).

The spelling of 20014187 in words is "twenty million, fourteen thousand, one hundred eighty-seven".