20670779196 has 72 divisors (see below), whose sum is σ = 56820057840. Its totient is φ = 6309674496.

The previous prime is 20670779191. The next prime is 20670779197. The reversal of 20670779196 is 69197707602.

It is a happy number.

It is a super-2 number, since 2×20670779196² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670779191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 433786 + ... + 479073.

It is an arithmetic number, because the mean of its divisors is an integer number (789167470).

Almost surely, 2^20670779196 is an apocalyptic number.

It is an amenable number.

20670779196 is an abundant number, since it is smaller than the sum of its proper divisors (36149278644).

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

20670779196 is a wasteful number, since it uses less digits than its factorization.

20670779196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912923 (or 912918 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 54.

The spelling of 20670779196 in words is "twenty billion, six hundred seventy million, seven hundred seventy-nine thousand, one hundred ninety-six".