20013172345632 has 48 divisors (see below), whose sum is σ = 55624846671072. Its totient is φ = 6278642304000.

The previous prime is 20013172345613. The next prime is 20013172345651. The reversal of 20013172345632 is 23654327131002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20013172345613) and next prime (20013172345651).

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

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, 6131484994 + ... + 6131488257.

It is an arithmetic number, because the mean of its divisors is an integer number (1158850972314).

Almost surely, 2^{20013172345632} is an apocalyptic number.

It is an amenable number.

20013172345632 is an abundant number, since it is smaller than the sum of its proper divisors (35611674325440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20013172345632 is a wasteful number, since it uses less digits than its factorization.

20013172345632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12262973281 (or 12262973273 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 39.

Adding to 20013172345632 its reverse (23654327131002), we get a palindrome (43667499476634).

The spelling of 20013172345632 in words is "twenty trillion, thirteen billion, one hundred seventy-two million, three hundred forty-five thousand, six hundred thirty-two".