32181408913 has 4 divisors (see below), whose sum is σ = 32187024100. Its totient is φ = 32175793728.

The previous prime is 32181408881. The next prime is 32181408929. The reversal of 32181408913 is 31980418123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16981477969 + 15199930944 = 130313^2 + 123288^2 .

It is a cyclic number.

It is not a de Polignac number, because 32181408913 - 2⁵ = 32181408881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32181408983) 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, 2798988 + ... + 2810461.

It is an arithmetic number, because the mean of its divisors is an integer number (8046756025).

Almost surely, 2^32181408913 is an apocalyptic number.

It is an amenable number.

32181408913 is a deficient number, since it is larger than the sum of its proper divisors (5615187).

32181408913 is an equidigital number, since it uses as much as digits as its factorization.

32181408913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615186.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 32181408913 in words is "thirty-two billion, one hundred eighty-one million, four hundred eight thousand, nine hundred thirteen".