20778273202018 has 8 divisors (see below), whose sum is σ = 32807799792720. Its totient is φ = 9842339937780.

The previous prime is 20778273202007. The next prime is 20778273202021. The reversal of 20778273202018 is 81020237287702.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273398331568 + ... + 273398331643.

It is an arithmetic number, because the mean of its divisors is an integer number (4100974974090).

Almost surely, 2^{20778273202018} is an apocalyptic number.

20778273202018 is a deficient number, since it is larger than the sum of its proper divisors (12029526590702).

20778273202018 is a wasteful number, since it uses less digits than its factorization.

20778273202018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546796663232.

The product of its (nonzero) digits is 1053696, while the sum is 49.

The spelling of 20778273202018 in words is "twenty trillion, seven hundred seventy-eight billion, two hundred seventy-three million, two hundred two thousand, eighteen".