19739220056640 has 448 divisors, whose sum is σ = 79593176977920. Its totient is φ = 4511274393600.

The previous prime is 19739220056513. The next prime is 19739220056651. The reversal of 19739220056640 is 4665002293791.

19739220056640 is a `hidden beast` number, since 1 + 9 + 7 + 39 + 2 + 2 + 0 + 0 + 566 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 707662534 + ... + 707690426.

Almost surely, 2^{19739220056640} is an apocalyptic number.

19739220056640 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 19739220056640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39796588488960).

19739220056640 is an abundant number, since it is smaller than the sum of its proper divisors (59853956921280).

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

19739220056640 is a wasteful number, since it uses less digits than its factorization.

19739220056640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39627 (or 39611 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 19739220056640 in words is "nineteen trillion, seven hundred thirty-nine billion, two hundred twenty million, fifty-six thousand, six hundred forty".