20188201 has 4 divisors (see below), whose sum is σ = 22023504. Its totient is φ = 18352900.

The previous prime is 20188169. The next prime is 20188219. The reversal of 20188201 is 10288102.

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 not a de Polignac number, because 20188201 - 2⁵ = 20188169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20188261) 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, 917635 + ... + 917656.

It is an arithmetic number, because the mean of its divisors is an integer number (5505876).

Almost surely, 2^20188201 is an apocalyptic number.

It is an amenable number.

20188201 is a deficient number, since it is larger than the sum of its proper divisors (1835303).

20188201 is a wasteful number, since it uses less digits than its factorization.

20188201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835302.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 20188201 is about 4493.1281975924. The cubic root of 20188201 is about 272.2905317275.

Subtracting from 20188201 its reverse (10288102), we obtain a palindrome (9900099).

The spelling of 20188201 in words is "twenty million, one hundred eighty-eight thousand, two hundred one".