20645401441 has 8 divisors (see below), whose sum is σ = 23596905600. Its totient is φ = 17694437568.

The previous prime is 20645401433. The next prime is 20645401459. The reversal of 20645401441 is 14410454602.

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 20645401441 - 2³ = 20645401433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20645401471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49576 + ... + 209161.

It is an arithmetic number, because the mean of its divisors is an integer number (2949613200).

Almost surely, 2^20645401441 is an apocalyptic number.

It is an amenable number.

20645401441 is a deficient number, since it is larger than the sum of its proper divisors (2951504159).

20645401441 is a wasteful number, since it uses less digits than its factorization.

20645401441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270143.

The product of its (nonzero) digits is 15360, while the sum is 31.

The spelling of 20645401441 in words is "twenty billion, six hundred forty-five million, four hundred one thousand, four hundred forty-one".