20405652001 has 4 divisors (see below), whose sum is σ = 23320745152. Its totient is φ = 17490558852.

The previous prime is 20405651969. The next prime is 20405652061. The reversal of 20405652001 is 10025650402.

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 20405652001 - 2⁵ = 20405651969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20405652061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1457546565 + ... + 1457546578.

It is an arithmetic number, because the mean of its divisors is an integer number (5830186288).

Almost surely, 2^20405652001 is an apocalyptic number.

It is an amenable number.

20405652001 is a deficient number, since it is larger than the sum of its proper divisors (2915093151).

20405652001 is an equidigital number, since it uses as much as digits as its factorization.

20405652001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915093150.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 20405652001 in words is "twenty billion, four hundred five million, six hundred fifty-two thousand, one".