20883936924 has 72 divisors (see below), whose sum is σ = 54641910960. Its totient is φ = 6717376512.

The previous prime is 20883936869. The next prime is 20883936929. The reversal of 20883936924 is 42963938802.

It is a happy number.

It is a super-2 number, since 2×20883936924² (a number of 21 digits) contains 22 as substring.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (20883936929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2201239 + ... + 2210705.

It is an arithmetic number, because the mean of its divisors is an integer number (758915430).

Almost surely, 2^20883936924 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 20883936924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27320955480).

20883936924 is an abundant number, since it is smaller than the sum of its proper divisors (33757974036).

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

20883936924 is a wasteful number, since it uses less digits than its factorization.

20883936924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11619 (or 11614 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 20883936924 in words is "twenty billion, eight hundred eighty-three million, nine hundred thirty-six thousand, nine hundred twenty-four".