19693756411940 has 192 divisors, whose sum is σ = 46766987366400. Its totient is φ = 6911721653760.

The previous prime is 19693756411919. The next prime is 19693756411991. The reversal of 19693756411940 is 4911465739691.

It is a super-2 number, since 2×19693756411940² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 984136535 + ... + 984156545.

It is an arithmetic number, because the mean of its divisors is an integer number (243578059200).

Almost surely, 2^{19693756411940} is an apocalyptic number.

19693756411940 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 19693756411940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23383493683200).

19693756411940 is an abundant number, since it is smaller than the sum of its proper divisors (27073230954460).

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

19693756411940 is a wasteful number, since it uses less digits than its factorization.

19693756411940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21082 (or 21080 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 65.

The spelling of 19693756411940 in words is "nineteen trillion, six hundred ninety-three billion, seven hundred fifty-six million, four hundred eleven thousand, nine hundred forty".