20220149 has 2 divisors, whose sum is σ = 20220150. Its totient is φ = 20220148.

The previous prime is 20220143. The next prime is 20220173. The reversal of 20220149 is 94102202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18645124 + 1575025 = 4318^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220149 - 2⁴ = 20220133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20220149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110074 + 10110075.

It is an arithmetic number, because the mean of its divisors is an integer number (10110075).

Almost surely, 2^20220149 is an apocalyptic number.

It is an amenable number.

20220149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220149 is an equidigital number, since it uses as much as digits as its factorization.

20220149 is an evil number, because the sum of its binary digits is even.

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

The square root of 20220149 is about 4496.6819989855. The cubic root of 20220149 is about 272.4340900551.

The spelling of 20220149 in words is "twenty million, two hundred twenty thousand, one hundred forty-nine".