20163677976 has 240 divisors, whose sum is σ = 61794912960. Its totient is φ = 6139411200.

The previous prime is 20163677969. The next prime is 20163677977. The reversal of 20163677976 is 67977636102.

20163677976 is a `hidden beast` number, since 201 + 6 + 367 + 7 + 9 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163677977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 11059801 + ... + 11061623.

It is an arithmetic number, because the mean of its divisors is an integer number (257478804).

Almost surely, 2^20163677976 is an apocalyptic number.

20163677976 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20163677976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30897456480).

20163677976 is an abundant number, since it is smaller than the sum of its proper divisors (41631234984).

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

20163677976 is a wasteful number, since it uses less digits than its factorization.

20163677976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968 (or 1942 counting only the distinct ones).

The product of its (nonzero) digits is 4000752, while the sum is 54.

The spelling of 20163677976 in words is "twenty billion, one hundred sixty-three million, six hundred seventy-seven thousand, nine hundred seventy-six".