19478725550976 has 256 divisors, whose sum is σ = 54333517063680. Its totient is φ = 6171128832000.

The previous prime is 19478725550971. The next prime is 19478725551011. The reversal of 19478725550976 is 67905552787491.

It is a junction number, because it is equal to n+sod(n) for n = 19478725550898 and 19478725550907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19478725550971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4188070251 + ... + 4188074901.

It is an arithmetic number, because the mean of its divisors is an integer number (212240301030).

Almost surely, 2^{19478725550976} is an apocalyptic number.

19478725550976 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 19478725550976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27166758531840).

19478725550976 is an abundant number, since it is smaller than the sum of its proper divisors (34854791512704).

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

19478725550976 is a wasteful number, since it uses less digits than its factorization.

19478725550976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7605 (or 7593 counting only the distinct ones).

The product of its (nonzero) digits is 1333584000, while the sum is 75.

The spelling of 19478725550976 in words is "nineteen trillion, four hundred seventy-eight billion, seven hundred twenty-five million, five hundred fifty thousand, nine hundred seventy-six".