20628325805 has 8 divisors (see below), whose sum is σ = 24780136032. Its totient is φ = 16485230608.

The previous prime is 20628325789. The next prime is 20628325807. The reversal of 20628325805 is 50852382602.

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

It is a cyclic number.

It is not a de Polignac number, because 20628325805 - 2⁴ = 20628325789 is a prime.

It is a super-3 number, since 3×20628325805³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20628325807) 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, 2173547 + ... + 2183016.

It is an arithmetic number, because the mean of its divisors is an integer number (3097517004).

Almost surely, 2^20628325805 is an apocalyptic number.

It is an amenable number.

20628325805 is a deficient number, since it is larger than the sum of its proper divisors (4151810227).

20628325805 is an equidigital number, since it uses as much as digits as its factorization.

20628325805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357515.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 20628325805 in words is "twenty billion, six hundred twenty-eight million, three hundred twenty-five thousand, eight hundred five".