20181446417 has 4 divisors (see below), whose sum is σ = 22016123376. Its totient is φ = 18346769460.

The previous prime is 20181446399. The next prime is 20181446447. The reversal of 20181446417 is 71464418102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20181446417 - 2¹⁰ = 20181445393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20181446447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 917338463 + ... + 917338484.

It is an arithmetic number, because the mean of its divisors is an integer number (5504030844).

Almost surely, 2^20181446417 is an apocalyptic number.

It is an amenable number.

20181446417 is a deficient number, since it is larger than the sum of its proper divisors (1834676959).

20181446417 is a wasteful number, since it uses less digits than its factorization.

20181446417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834676958.

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 20181446417 in words is "twenty billion, one hundred eighty-one million, four hundred forty-six thousand, four hundred seventeen".