19960020037518 has 512 divisors, whose sum is σ = 47556453335040. Its totient is φ = 5529503232000.

The previous prime is 19960020037469. The next prime is 19960020037537. The reversal of 19960020037518 is 81573002006991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 64180128583 + ... + 64180128893.

It is an arithmetic number, because the mean of its divisors is an integer number (92883697920).

Almost surely, 2^{19960020037518} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19960020037518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23778226667520).

19960020037518 is an abundant number, since it is smaller than the sum of its proper divisors (27596433297522).

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

19960020037518 is a wasteful number, since it uses less digits than its factorization.

19960020037518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 19960020037518 in words is "nineteen trillion, nine hundred sixty billion, twenty million, thirty-seven thousand, five hundred eighteen".