12320173672 has 8 divisors (see below), whose sum is σ = 23100325650. Its totient is φ = 6160086832.

The previous prime is 12320173643. The next prime is 12320173673. The reversal of 12320173672 is 27637102321.

It can be written as a sum of positive squares in only one way, i.e., 8261719236 + 4058454436 = 90894^2 + 63706^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12320173673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770010847 + ... + 770010862.

Almost surely, 2^12320173672 is an apocalyptic number.

It is an amenable number.

12320173672 is a deficient number, since it is larger than the sum of its proper divisors (10780151978).

12320173672 is a wasteful number, since it uses less digits than its factorization.

12320173672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540021715 (or 1540021711 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

Adding to 12320173672 its reverse (27637102321), we get a palindrome (39957275993).

The spelling of 12320173672 in words is "twelve billion, three hundred twenty million, one hundred seventy-three thousand, six hundred seventy-two".