20884995072 has 176 divisors, whose sum is σ = 64542401280. Its totient is φ = 6658781184.

The previous prime is 20884995067. The next prime is 20884995107. The reversal of 20884995072 is 27059948802.

20884995072 is a `hidden beast` number, since 2 + 0 + 88 + 499 + 5 + 0 + 72 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 619483 + ... + 652325.

Almost surely, 2^20884995072 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 20884995072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32271200640).

20884995072 is an abundant number, since it is smaller than the sum of its proper divisors (43657406208).

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

20884995072 is a wasteful number, since it uses less digits than its factorization.

20884995072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32895 (or 32871 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 20884995072 in words is "twenty billion, eight hundred eighty-four million, nine hundred ninety-five thousand, seventy-two".