20707201 has 4 divisors (see below), whose sum is σ = 20839252. Its totient is φ = 20575152.

The previous prime is 20707187. The next prime is 20707229. The reversal of 20707201 is 10270702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7017201 + 13690000 = 2649^2 + 3700^2 .

It is a cyclic number.

It is not a de Polignac number, because 20707201 - 2¹³ = 20699009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20707231) 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, 65790 + ... + 66103.

It is an arithmetic number, because the mean of its divisors is an integer number (5209813).

Almost surely, 2^20707201 is an apocalyptic number.

It is an amenable number.

20707201 is a deficient number, since it is larger than the sum of its proper divisors (132051).

20707201 is a wasteful number, since it uses less digits than its factorization.

20707201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132050.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 20707201 is about 4550.5165640837. The cubic root of 20707201 is about 274.6041732319.

Adding to 20707201 its reverse (10270702), we get a palindrome (30977903).

It can be divided in two parts, 2070720 and 1, that added together give a square (2070721 = 1439²).

The spelling of 20707201 in words is "twenty million, seven hundred seven thousand, two hundred one".