20201819201 has 4 divisors (see below), whose sum is σ = 20397953472. Its totient is φ = 20005684932.

The previous prime is 20201819189. The next prime is 20201819221. The reversal of 20201819201 is 10291810202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201819201 is a prime.

It is a super-2 number, since 2×20201819201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201819221) 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, 98066981 + ... + 98067186.

It is an arithmetic number, because the mean of its divisors is an integer number (5099488368).

Almost surely, 2^20201819201 is an apocalyptic number.

It is an amenable number.

20201819201 is a deficient number, since it is larger than the sum of its proper divisors (196134271).

20201819201 is a wasteful number, since it uses less digits than its factorization.

20201819201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196134270.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 20201819201 in words is "twenty billion, two hundred one million, eight hundred nineteen thousand, two hundred one".