20655691196 has 12 divisors (see below), whose sum is σ = 41311382448. Its totient is φ = 8852439072.

The previous prime is 20655691171. The next prime is 20655691241. The reversal of 20655691196 is 69119655602.

It is a happy number.

20655691196 is an admirable number.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 368851601 + ... + 368851656.

It is an arithmetic number, because the mean of its divisors is an integer number (3442615204).

Almost surely, 2^20655691196 is an apocalyptic number.

It is an amenable number.

20655691196 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20655691196 is a wasteful number, since it uses less digits than its factorization.

20655691196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737703268 (or 737703266 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 50.

The spelling of 20655691196 in words is "twenty billion, six hundred fifty-five million, six hundred ninety-one thousand, one hundred ninety-six".