20844543401 has 8 divisors (see below), whose sum is σ = 22918554624. Its totient is φ = 18800374320.

The previous prime is 20844543373. The next prime is 20844543409. The reversal of 20844543401 is 10434544802.

It is a happy number.

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 20844543401 - 2¹⁴ = 20844527017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20844543409) 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, 7459070 + ... + 7461863.

It is an arithmetic number, because the mean of its divisors is an integer number (2864819328).

Almost surely, 2^20844543401 is an apocalyptic number.

It is an amenable number.

20844543401 is a deficient number, since it is larger than the sum of its proper divisors (2074011223).

20844543401 is a wasteful number, since it uses less digits than its factorization.

20844543401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14921071.

The product of its (nonzero) digits is 61440, while the sum is 35.

The spelling of 20844543401 in words is "twenty billion, eight hundred forty-four million, five hundred forty-three thousand, four hundred one".