20943396417 has 16 divisors (see below), whose sum is σ = 28725671360. Its totient is φ = 13562914752.

The previous prime is 20943396401. The next prime is 20943396451. The reversal of 20943396417 is 71469334902.

It is a happy number.

It is not a de Polignac number, because 20943396417 - 2⁴ = 20943396401 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20943397417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83698 + ... + 221115.

It is an arithmetic number, because the mean of its divisors is an integer number (1795354460).

Almost surely, 2^20943396417 is an apocalyptic number.

It is an amenable number.

20943396417 is a deficient number, since it is larger than the sum of its proper divisors (7782274943).

20943396417 is a wasteful number, since it uses less digits than its factorization.

20943396417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305472.

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 20943396417 in words is "twenty billion, nine hundred forty-three million, three hundred ninety-six thousand, four hundred seventeen".