20676943872 has 672 divisors, whose sum is σ = 72133431552. Its totient is φ = 5860491264.

The previous prime is 20676943871. The next prime is 20676943883. The reversal of 20676943872 is 27834967602.

20676943872 is a `hidden beast` number, since 20 + 67 + 69 + 438 + 72 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (20676943871) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 439934953 + ... + 439934999.

It is an arithmetic number, because the mean of its divisors is an integer number (107341416).

Almost surely, 2^20676943872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20676943872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36066715776).

20676943872 is an abundant number, since it is smaller than the sum of its proper divisors (51456487680).

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

20676943872 is an equidigital number, since it uses as much as digits as its factorization.

20676943872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 20676943872 in words is "twenty billion, six hundred seventy-six million, nine hundred forty-three thousand, eight hundred seventy-two".