20197606791018 has 16 divisors (see below), whose sum is σ = 40544273414016. Its totient is φ = 6707692291680.

The previous prime is 20197606790993. The next prime is 20197606791029. The reversal of 20197606791018 is 81019760679102.

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, 6210824571 + ... + 6210827822.

It is an arithmetic number, because the mean of its divisors is an integer number (2534017088376).

Almost surely, 2^{20197606791018} is an apocalyptic number.

20197606791018 is an abundant number, since it is smaller than the sum of its proper divisors (20346666622998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20197606791018 is a wasteful number, since it uses less digits than its factorization.

20197606791018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12421652669.

The product of its (nonzero) digits is 2286144, while the sum is 57.

The spelling of 20197606791018 in words is "twenty trillion, one hundred ninety-seven billion, six hundred six million, seven hundred ninety-one thousand, eighteen".