20514149 has 2 divisors, whose sum is σ = 20514150. Its totient is φ = 20514148.

The previous prime is 20514103. The next prime is 20514173. The reversal of 20514149 is 94141502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19624900 + 889249 = 4430^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 20514149 - 2¹² = 20510053 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 (20514449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10257074 + 10257075.

It is an arithmetic number, because the mean of its divisors is an integer number (10257075).

Almost surely, 2^20514149 is an apocalyptic number.

It is an amenable number.

20514149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20514149 is an equidigital number, since it uses as much as digits as its factorization.

20514149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 20514149 is about 4529.2547952174. The cubic root of 20514149 is about 273.7481346523.

The spelling of 20514149 in words is "twenty million, five hundred fourteen thousand, one hundred forty-nine".