20885338040 has 64 divisors (see below), whose sum is σ = 53717644800. Its totient is φ = 7159022208.

The previous prime is 20885338039. The next prime is 20885338043. The reversal of 20885338040 is 4083358802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20885338043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2201387 + ... + 2210853.

It is an arithmetic number, because the mean of its divisors is an integer number (839338200).

Almost surely, 2^20885338040 is an apocalyptic number.

20885338040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20885338040 is an abundant number, since it is smaller than the sum of its proper divisors (32832306760).

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

20885338040 is a wasteful number, since it uses less digits than its factorization.

20885338040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17364 (or 17360 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 20885338040 in words is "twenty billion, eight hundred eighty-five million, three hundred thirty-eight thousand, forty".