19940352079536 has 240 divisors, whose sum is σ = 66438813675520. Its totient is φ = 5462878256640.

The previous prime is 19940352079463. The next prime is 19940352079553. The reversal of 19940352079536 is 63597025304991.

19940352079536 is a `hidden beast` number, since 1 + 9 + 9 + 4 + 0 + 3 + 5 + 20 + 79 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 478821 + ... + 6333243.

Almost surely, 2^{19940352079536} is an apocalyptic number.

19940352079536 is a gapful number since it is divisible by the number (16) 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 19940352079536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33219406837760).

19940352079536 is an abundant number, since it is smaller than the sum of its proper divisors (46498461595984).

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

19940352079536 is a wasteful number, since it uses less digits than its factorization.

19940352079536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5854584 (or 5854575 counting only the distinct ones).

The product of its (nonzero) digits is 55112400, while the sum is 63.

The spelling of 19940352079536 in words is "nineteen trillion, nine hundred forty billion, three hundred fifty-two million, seventy-nine thousand, five hundred thirty-six".