20178550228807 has 4 divisors (see below), whose sum is σ = 21365523771696. Its totient is φ = 18991576685920.

The previous prime is 20178550228783. The next prime is 20178550228849. The reversal of 20178550228807 is 70882205587102.

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

It is a de Polignac number, because none of the positive numbers 2^k-20178550228807 is a prime.

It is a super-3 number, since 3×20178550228807³ (a number of 41 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 (20178550228897) 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, 593486771419 + ... + 593486771452.

It is an arithmetic number, because the mean of its divisors is an integer number (5341380942924).

Almost surely, 2^{20178550228807} is an apocalyptic number.

20178550228807 is a deficient number, since it is larger than the sum of its proper divisors (1186973542889).

20178550228807 is a wasteful number, since it uses less digits than its factorization.

20178550228807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186973542888.

The product of its (nonzero) digits is 5017600, while the sum is 55.

The spelling of 20178550228807 in words is "twenty trillion, one hundred seventy-eight billion, five hundred fifty million, two hundred twenty-eight thousand, eight hundred seven".