20404422001 has 4 divisors (see below), whose sum is σ = 20405503552. Its totient is φ = 20403340452.

The previous prime is 20404421987. The next prime is 20404422007. The reversal of 20404422001 is 10022440402.

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 20404422001 - 2⁵ = 20404421969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20404422001.

It is not an unprimeable number, because it can be changed into a prime (20404422007) 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, 511965 + ... + 550378.

It is an arithmetic number, because the mean of its divisors is an integer number (5101375888).

Almost surely, 2^20404422001 is an apocalyptic number.

It is an amenable number.

20404422001 is a deficient number, since it is larger than the sum of its proper divisors (1081551).

20404422001 is a wasteful number, since it uses less digits than its factorization.

20404422001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081550.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 20404422001 its reverse (10022440402), we get a palindrome (30426862403).

The spelling of 20404422001 in words is "twenty billion, four hundred four million, four hundred twenty-two thousand, one".