20219201 has 4 divisors (see below), whose sum is σ = 20243652. Its totient is φ = 20194752.

The previous prime is 20219197. The next prime is 20219207. The reversal of 20219201 is 10291202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10291202 = 2 ⋅5145601.

It can be written as a sum of positive squares in 2 ways, for example, as 10233601 + 9985600 = 3199^2 + 3160^2 .

It is a cyclic number.

It is not a de Polignac number, because 20219201 - 2² = 20219197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20219201.

It is not an unprimeable number, because it can be changed into a prime (20219207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10940 + ... + 12653.

It is an arithmetic number, because the mean of its divisors is an integer number (5060913).

Almost surely, 2^20219201 is an apocalyptic number.

It is an amenable number.

20219201 is a deficient number, since it is larger than the sum of its proper divisors (24451).

20219201 is an equidigital number, since it uses as much as digits as its factorization.

20219201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24450.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 20219201 is about 4496.5765866935. The cubic root of 20219201 is about 272.4298323952.

The spelling of 20219201 in words is "twenty million, two hundred nineteen thousand, two hundred one".