19936890650040 has 768 divisors, whose sum is σ = 76808532787200. Its totient is φ = 4049288755200.

The previous prime is 19936890650029. The next prime is 19936890650041. The reversal of 19936890650040 is 4005609863991.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19936890650041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 840533301 + ... + 840557019.

It is an arithmetic number, because the mean of its divisors is an integer number (100011110400).

Almost surely, 2^{19936890650040} is an apocalyptic number.

19936890650040 is a gapful number since it is divisible by the number (10) 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 19936890650040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38404266393600).

19936890650040 is an abundant number, since it is smaller than the sum of its proper divisors (56871642137160).

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

19936890650040 is a wasteful number, since it uses less digits than its factorization.

19936890650040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23988 (or 23971 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 60.

The spelling of 19936890650040 in words is "nineteen trillion, nine hundred thirty-six billion, eight hundred ninety million, six hundred fifty thousand, forty".