20320665666232 has 16 divisors (see below), whose sum is σ = 39330320644800. Its totient is φ = 9832580160960.

The previous prime is 20320665666181. The next prime is 20320665666239. The reversal of 20320665666232 is 23266656602302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320665666239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40969083757 + ... + 40969084252.

It is an arithmetic number, because the mean of its divisors is an integer number (2458145040300).

Almost surely, 2^{20320665666232} is an apocalyptic number.

It is an amenable number.

20320665666232 is a deficient number, since it is larger than the sum of its proper divisors (19009654978568).

20320665666232 is a wasteful number, since it uses less digits than its factorization.

20320665666232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81938168046 (or 81938168042 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 49.

The spelling of 20320665666232 in words is "twenty trillion, three hundred twenty billion, six hundred sixty-five million, six hundred sixty-six thousand, two hundred thirty-two".