19478166372 has 144 divisors (see below), whose sum is σ = 57186088960. Its totient is φ = 5475128256.

The previous prime is 19478166371. The next prime is 19478166397. The reversal of 19478166372 is 27366187491.

19478166372 is a `hidden beast` number, since 1 + 9 + 478 + 166 + 3 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (19478166371) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6110163 + ... + 6113349.

Almost surely, 2^19478166372 is an apocalyptic number.

19478166372 is a gapful number since it is divisible by the number (12) 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 19478166372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28593044480).

19478166372 is an abundant number, since it is smaller than the sum of its proper divisors (37707922588).

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

19478166372 is a wasteful number, since it uses less digits than its factorization.

19478166372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590 (or 3585 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The spelling of 19478166372 in words is "nineteen billion, four hundred seventy-eight million, one hundred sixty-six thousand, three hundred seventy-two".