20005554401 has 8 divisors (see below), whose sum is σ = 22889390784. Its totient is φ = 17128193040.

The previous prime is 20005554397. The next prime is 20005554407. The reversal of 20005554401 is 10445550002.

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

It is not a de Polignac number, because 20005554401 - 2² = 20005554397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20005554407) 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, 1612130 + ... + 1624491.

It is an arithmetic number, because the mean of its divisors is an integer number (2861173848).

Almost surely, 2^20005554401 is an apocalyptic number.

It is an amenable number.

20005554401 is a deficient number, since it is larger than the sum of its proper divisors (2883836383).

20005554401 is an equidigital number, since it uses as much as digits as its factorization.

20005554401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237511.

The product of its (nonzero) digits is 4000, while the sum is 26.

The spelling of 20005554401 in words is "twenty billion, five million, five hundred fifty-four thousand, four hundred one".