19640827278720 has 160 divisors (see below), whose sum is σ = 70140940657920. Its totient is φ = 5237553927168.

The previous prime is 19640827278697. The next prime is 19640827278767. The reversal of 19640827278720 is 2787272804691.

19640827278720 is a `hidden beast` number, since 1 + 96 + 408 + 2 + 7 + 2 + 78 + 72 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 189385152 + ... + 189488831.

It is an arithmetic number, because the mean of its divisors is an integer number (438380879112).

Almost surely, 2^{19640827278720} is an apocalyptic number.

19640827278720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19640827278720 is an abundant number, since it is smaller than the sum of its proper divisors (50500113379200).

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

19640827278720 is an equidigital number, since it uses as much as digits as its factorization.

19640827278720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378874014 (or 378873993 counting only the distinct ones).

The product of its (nonzero) digits is 37933056, while the sum is 63.

The spelling of 19640827278720 in words is "nineteen trillion, six hundred forty billion, eight hundred twenty-seven million, two hundred seventy-eight thousand, seven hundred twenty".