13000020032 has 14 divisors (see below), whose sum is σ = 25796914878. Its totient is φ = 6500009984.

The previous prime is 13000020031. The next prime is 13000020083. The reversal of 13000020032 is 23002000031.

It can be written as a sum of positive squares in only one way, i.e., 8329117696 + 4670902336 = 91264^2 + 68344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13000019995 and 13000020022.

It is not an unprimeable number, because it can be changed into a prime (13000020031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101562593 + ... + 101562720.

It is an arithmetic number, because the mean of its divisors is an integer number (1842636777).

Almost surely, 2^13000020032 is an apocalyptic number.

It is an amenable number.

13000020032 is a deficient number, since it is larger than the sum of its proper divisors (12796894846).

13000020032 is an equidigital number, since it uses as much as digits as its factorization.

13000020032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203125325 (or 203125315 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

Adding to 13000020032 its reverse (23002000031), we get a palindrome (36002020063).

The spelling of 13000020032 in words is "thirteen billion, twenty thousand, thirty-two".