20452001 has 4 divisors (see below), whose sum is σ = 20483604. Its totient is φ = 20420400.

The previous prime is 20451979. The next prime is 20452007. The reversal of 20452001 is 10025402.

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 11155600 + 9296401 = 3340^2 + 3049^2 .

It is a cyclic number.

It is not a de Polignac number, because 20452001 - 2¹⁸ = 20189857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20452007) 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, 14810 + ... + 16131.

It is an arithmetic number, because the mean of its divisors is an integer number (5120901).

Almost surely, 2^20452001 is an apocalyptic number.

It is an amenable number.

20452001 is a deficient number, since it is larger than the sum of its proper divisors (31603).

20452001 is an equidigital number, since it uses as much as digits as its factorization.

20452001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31602.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20452001 is about 4522.3888598837. The cubic root of 20452001 is about 273.4714133132.

Adding to 20452001 its reverse (10025402), we get a palindrome (30477403).

The spelling of 20452001 in words is "twenty million, four hundred fifty-two thousand, one".