20163731023447 has 8 divisors (see below), whose sum is σ = 21996918496512. Its totient is φ = 18330563719800.

The previous prime is 20163731023421. The next prime is 20163731023451. The reversal of 20163731023447 is 74432013736102.

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 20163731023447 - 2²⁷ = 20163596805719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163731023747) 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, 2912929 + ... + 6986602.

It is an arithmetic number, because the mean of its divisors is an integer number (2749614812064).

Almost surely, 2^{20163731023447} is an apocalyptic number.

20163731023447 is a deficient number, since it is larger than the sum of its proper divisors (1833187473065).

20163731023447 is a wasteful number, since it uses less digits than its factorization.

20163731023447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10084709.

The product of its (nonzero) digits is 508032, while the sum is 43.

Adding to 20163731023447 its reverse (74432013736102), we get a palindrome (94595744759549).

The spelling of 20163731023447 in words is "twenty trillion, one hundred sixty-three billion, seven hundred thirty-one million, twenty-three thousand, four hundred forty-seven".