19530380500 has 24 divisors (see below), whose sum is σ = 42654352104. Its totient is φ = 7812152000.

The previous prime is 19530380473. The next prime is 19530380543. The reversal of 19530380500 is 508303591.

It can be written as a sum of positive squares in 4 ways, for example, as 933058116 + 18597322384 = 30546^2 + 136372^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19529881 + ... + 19530880.

It is an arithmetic number, because the mean of its divisors is an integer number (1777264671).

Almost surely, 2^19530380500 is an apocalyptic number.

19530380500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19530380500 is an abundant number, since it is smaller than the sum of its proper divisors (23123971604).

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

19530380500 is a wasteful number, since it uses less digits than its factorization.

19530380500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39060780 (or 39060768 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The spelling of 19530380500 in words is "nineteen billion, five hundred thirty million, three hundred eighty thousand, five hundred".