220020149 has 2 divisors, whose sum is σ = 220020150. Its totient is φ = 220020148.

The previous prime is 220020091. The next prime is 220020173. The reversal of 220020149 is 941020022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134328100 + 85692049 = 11590^2 + 9257^2 .

It is a cyclic number.

It is not a de Polignac number, because 220020149 - 2¹² = 220016053 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220020149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220020049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010074 + 110010075.

It is an arithmetic number, because the mean of its divisors is an integer number (110010075).

Almost surely, 2^220020149 is an apocalyptic number.

It is an amenable number.

220020149 is a deficient number, since it is larger than the sum of its proper divisors (1).

220020149 is an equidigital number, since it uses as much as digits as its factorization.

220020149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 220020149 is about 14833.0761812916. The cubic root of 220020149 is about 603.6995027686.

The spelling of 220020149 in words is "two hundred twenty million, twenty thousand, one hundred forty-nine".