20640325244433 has 8 divisors (see below), whose sum is σ = 27561325836768. Its totient is φ = 13739770740864.

The previous prime is 20640325244353. The next prime is 20640325244443. The reversal of 20640325244433 is 33444252304602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20640325244433 - 2⁹ = 20640325243921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20640325244443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5111519835 + ... + 5111523872.

It is an arithmetic number, because the mean of its divisors is an integer number (3445165729596).

Almost surely, 2^{20640325244433} is an apocalyptic number.

It is an amenable number.

20640325244433 is a deficient number, since it is larger than the sum of its proper divisors (6921000592335).

20640325244433 is a wasteful number, since it uses less digits than its factorization.

20640325244433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10223044383.

The product of its (nonzero) digits is 1658880, while the sum is 42.

The spelling of 20640325244433 in words is "twenty trillion, six hundred forty billion, three hundred twenty-five million, two hundred forty-four thousand, four hundred thirty-three".