20904998401 has 8 divisors (see below), whose sum is σ = 23909716800. Its totient is φ = 17904852528.

The previous prime is 20904998383. The next prime is 20904998417. The reversal of 20904998401 is 10489940902.

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

It is a cyclic number.

It is not a de Polignac number, because 20904998401 - 2⁹ = 20904997889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20904998461) 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, 1133326 + ... + 1151623.

It is an arithmetic number, because the mean of its divisors is an integer number (2988714600).

Almost surely, 2^20904998401 is an apocalyptic number.

It is an amenable number.

20904998401 is a deficient number, since it is larger than the sum of its proper divisors (3004718399).

20904998401 is a wasteful number, since it uses less digits than its factorization.

20904998401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286263.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 20904998401 in words is "twenty billion, nine hundred four million, nine hundred ninety-eight thousand, four hundred one".