20219011 has 2 divisors, whose sum is σ = 20219012. Its totient is φ = 20219010.

The previous prime is 20218993. The next prime is 20219033. The reversal of 20219011 is 11091202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20219011 - 2¹⁷ = 20087939 is a prime.

It is not a weakly prime, because it can be changed into another prime (20219081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10109505 + 10109506.

It is an arithmetic number, because the mean of its divisors is an integer number (10109506).

Almost surely, 2^20219011 is an apocalyptic number.

20219011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20219011 is an equidigital number, since it uses as much as digits as its factorization.

20219011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 20219011 is about 4496.5554594601. Note that the first 3 decimals coincide. The cubic root of 20219011 is about 272.4289790507.

The spelling of 20219011 in words is "twenty million, two hundred nineteen thousand, eleven".