20149211 has 2 divisors, whose sum is σ = 20149212. Its totient is φ = 20149210.

The previous prime is 20149193. The next prime is 20149237. The reversal of 20149211 is 11294102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20149211 - 2⁶ = 20149147 is a prime.

It is not a weakly prime, because it can be changed into another prime (20149271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10074605 + 10074606.

It is an arithmetic number, because the mean of its divisors is an integer number (10074606).

Almost surely, 2^20149211 is an apocalyptic number.

20149211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20149211 is an equidigital number, since it uses as much as digits as its factorization.

20149211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 20149211 is about 4488.7872526998. The cubic root of 20149211 is about 272.1151248172.

The spelling of 20149211 in words is "twenty million, one hundred forty-nine thousand, two hundred eleven".