19788537773280 has 96 divisors (see below), whose sum is σ = 62367940389888. Its totient is φ = 5274061171200.

The previous prime is 19788537773261. The next prime is 19788537773287. The reversal of 19788537773280 is 8237773588791.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19788537773287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10378936 + ... + 12136695.

It is an arithmetic number, because the mean of its divisors is an integer number (649666045728).

Almost surely, 2^{19788537773280} is an apocalyptic number.

19788537773280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19788537773280 is an abundant number, since it is smaller than the sum of its proper divisors (42579402616608).

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

19788537773280 is a wasteful number, since it uses less digits than its factorization.

19788537773280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22517480 (or 22517472 counting only the distinct ones).

The product of its (nonzero) digits is 995742720, while the sum is 75.

The spelling of 19788537773280 in words is "nineteen trillion, seven hundred eighty-eight billion, five hundred thirty-seven million, seven hundred seventy-three thousand, two hundred eighty".