20032171671156 has 12 divisors (see below), whose sum is σ = 46741733899392. Its totient is φ = 6677390557048.

The previous prime is 20032171671097. The next prime is 20032171671203. The reversal of 20032171671156 is 65117617123002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834673819620 + ... + 834673819643.

It is an arithmetic number, because the mean of its divisors is an integer number (3895144491616).

Almost surely, 2^{20032171671156} is an apocalyptic number.

It is an amenable number.

20032171671156 is an abundant number, since it is smaller than the sum of its proper divisors (26709562228236).

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

20032171671156 is a wasteful number, since it uses less digits than its factorization.

20032171671156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669347639270 (or 1669347639268 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

Adding to 20032171671156 its reverse (65117617123002), we get a palindrome (85149788794158).

The spelling of 20032171671156 in words is "twenty trillion, thirty-two billion, one hundred seventy-one million, six hundred seventy-one thousand, one hundred fifty-six".