20514191 has 2 divisors, whose sum is σ = 20514192. Its totient is φ = 20514190.

The previous prime is 20514187. The next prime is 20514251. The reversal of 20514191 is 19141502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20514191 - 2² = 20514187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20513191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10257095 + 10257096.

It is an arithmetic number, because the mean of its divisors is an integer number (10257096).

Almost surely, 2^20514191 is an apocalyptic number.

20514191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20514191 is an equidigital number, since it uses as much as digits as its factorization.

20514191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 20514191 is about 4529.2594317394. The cubic root of 20514191 is about 273.7483214731.

Adding to 20514191 its reverse (19141502), we get a palindrome (39655693).

The spelling of 20514191 in words is "twenty million, five hundred fourteen thousand, one hundred ninety-one".