20253187 has 2 divisors, whose sum is σ = 20253188. Its totient is φ = 20253186.

The previous prime is 20253173. The next prime is 20253197. The reversal of 20253187 is 78135202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20253187 - 2¹⁹ = 19728899 is a prime.

It is not a weakly prime, because it can be changed into another prime (20253127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10126593 + 10126594.

It is an arithmetic number, because the mean of its divisors is an integer number (10126594).

Almost surely, 2^20253187 is an apocalyptic number.

20253187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20253187 is an equidigital number, since it uses as much as digits as its factorization.

20253187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 20253187 is about 4500.3540971795. The cubic root of 20253187 is about 272.5823873435.

Adding to 20253187 its reverse (78135202), we get a palindrome (98388389).

The spelling of 20253187 in words is "twenty million, two hundred fifty-three thousand, one hundred eighty-seven".