20665314532 has 12 divisors (see below), whose sum is σ = 36172434816. Its totient is φ = 10330333160.

The previous prime is 20665314517. The next prime is 20665314539. The reversal of 20665314532 is 23541356602.

It is a junction number, because it is equal to n+sod(n) for n = 20665314491 and 20665314500.

It is not an unprimeable number, because it can be changed into a prime (20665314539) 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, 560944 + ... + 596647.

It is an arithmetic number, because the mean of its divisors is an integer number (3014369568).

Almost surely, 2^20665314532 is an apocalyptic number.

It is an amenable number.

20665314532 is a deficient number, since it is larger than the sum of its proper divisors (15507120284).

20665314532 is a wasteful number, since it uses less digits than its factorization.

20665314532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162058 (or 1162056 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 20665314532 in words is "twenty billion, six hundred sixty-five million, three hundred fourteen thousand, five hundred thirty-two".