19473405390 has 24 divisors (see below), whose sum is σ = 50630854248. Its totient is φ = 5192908080.

The previous prime is 19473405317. The next prime is 19473405397. The reversal of 19473405390 is 9350437491.

19473405390 is a `hidden beast` number, since 1 + 9 + 4 + 73 + 40 + 539 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19473405397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108185496 + ... + 108185675.

It is an arithmetic number, because the mean of its divisors is an integer number (2109618927).

Almost surely, 2^19473405390 is an apocalyptic number.

19473405390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19473405390 is an abundant number, since it is smaller than the sum of its proper divisors (31157448858).

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

19473405390 is a wasteful number, since it uses less digits than its factorization.

19473405390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216371184 (or 216371181 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 19473405390 in words is "nineteen billion, four hundred seventy-three million, four hundred five thousand, three hundred ninety".