20642055173345 has 8 divisors (see below), whose sum is σ = 24900154513920. Its totient is φ = 16427185268080.

The previous prime is 20642055173287. The next prime is 20642055173371. The reversal of 20642055173345 is 54337155024602.

It is a happy number.

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

It is not a de Polignac number, because 20642055173345 - 2¹² = 20642055169249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20642055173345.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10807357775 + ... + 10807359684.

It is an arithmetic number, because the mean of its divisors is an integer number (3112519314240).

Almost surely, 2^{20642055173345} is an apocalyptic number.

It is an amenable number.

20642055173345 is a deficient number, since it is larger than the sum of its proper divisors (4258099340575).

20642055173345 is a wasteful number, since it uses less digits than its factorization.

20642055173345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21614717655.

The product of its (nonzero) digits is 3024000, while the sum is 47.

The spelling of 20642055173345 in words is "twenty trillion, six hundred forty-two billion, fifty-five million, one hundred seventy-three thousand, three hundred forty-five".