20712201 has 4 divisors (see below), whose sum is σ = 27616272. Its totient is φ = 13808132.

The previous prime is 20712199. The next prime is 20712221. The reversal of 20712201 is 10221702.

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 20712201 - 2¹ = 20712199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20712221) 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, 3452031 + ... + 3452036.

It is an arithmetic number, because the mean of its divisors is an integer number (6904068).

Almost surely, 2^20712201 is an apocalyptic number.

It is an amenable number.

20712201 is a deficient number, since it is larger than the sum of its proper divisors (6904071).

20712201 is an equidigital number, since it uses as much as digits as its factorization.

20712201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6904070.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 20712201 is about 4551.0659191007. The cubic root of 20712201 is about 274.6262736012.

Adding to 20712201 its reverse (10221702), we get a palindrome (30933903).

It can be divided in two parts, 20 and 712201, that added together give a triangular number (712221 = T₁₁₉₃).

The spelling of 20712201 in words is "twenty million, seven hundred twelve thousand, two hundred one".