20201243032040 has 128 divisors (see below), whose sum is σ = 53012187936000. Its totient is φ = 6925355055360.

The previous prime is 20201243032027. The next prime is 20201243032111. The reversal of 20201243032040 is 4023034210202.

It is a junction number, because it is equal to n+sod(n) for n = 20201243031997 and 20201243032015.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128079707 + ... + 128237333.

It is an arithmetic number, because the mean of its divisors is an integer number (414157718250).

Almost surely, 2^{20201243032040} is an apocalyptic number.

20201243032040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201243032040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26506093968000).

20201243032040 is an abundant number, since it is smaller than the sum of its proper divisors (32810944903960).

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

20201243032040 is a wasteful number, since it uses less digits than its factorization.

20201243032040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167000 (or 166982 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20201243032040 its reverse (4023034210202), we get a palindrome (24224277242242).

The spelling of 20201243032040 in words is "twenty trillion, two hundred one billion, two hundred forty-three million, thirty-two thousand, forty".