20404420401 has 8 divisors (see below), whose sum is σ = 27207093760. Its totient is φ = 13602346992.

The previous prime is 20404420369. The next prime is 20404420403. The reversal of 20404420401 is 10402440402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20404420401 - 2⁵ = 20404420369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404420403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63505 + ... + 211758.

It is an arithmetic number, because the mean of its divisors is an integer number (3400886720).

Almost surely, 2^20404420401 is an apocalyptic number.

It is an amenable number.

20404420401 is a deficient number, since it is larger than the sum of its proper divisors (6802673359).

20404420401 is a wasteful number, since it uses less digits than its factorization.

20404420401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299975.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 20404420401 its reverse (10402440402), we get a palindrome (30806860803).

The spelling of 20404420401 in words is "twenty billion, four hundred four million, four hundred twenty thousand, four hundred one".