20704876992 has 224 divisors, whose sum is σ = 64414400000. Its totient is φ = 6503473152.

The previous prime is 20704876979. The next prime is 20704876999. The reversal of 20704876992 is 29967840702.

20704876992 is a `hidden beast` number, since 2 + 0 + 70 + 487 + 6 + 9 + 92 = 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 (20704876999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6531984 + ... + 6535152.

Almost surely, 2^20704876992 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 20704876992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32207200000).

20704876992 is an abundant number, since it is smaller than the sum of its proper divisors (43709523008).

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

20704876992 is a wasteful number, since it uses less digits than its factorization.

20704876992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408 (or 3392 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 20704876992 in words is "twenty billion, seven hundred four million, eight hundred seventy-six thousand, nine hundred ninety-two".