19478386220 has 12 divisors (see below), whose sum is σ = 40904611104. Its totient is φ = 7791354480.

The previous prime is 19478386217. The next prime is 19478386223. The reversal of 19478386220 is 2268387491.

It is an interprime number because it is at equal distance from previous prime (19478386217) and next prime (19478386223).

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (19478386223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486959636 + ... + 486959675.

It is an arithmetic number, because the mean of its divisors is an integer number (3408717592).

Almost surely, 2^19478386220 is an apocalyptic number.

19478386220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19478386220 is an abundant number, since it is smaller than the sum of its proper divisors (21426224884).

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

19478386220 is a wasteful number, since it uses less digits than its factorization.

19478386220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973919320 (or 973919318 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 19478386220 in words is "nineteen billion, four hundred seventy-eight million, three hundred eighty-six thousand, two hundred twenty".