19530841812 has 48 divisors (see below), whose sum is σ = 46004754432. Its totient is φ = 6448619520.

The previous prime is 19530841807. The next prime is 19530841819. The reversal of 19530841812 is 21814803591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19530841819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 966888 + ... + 986880.

It is an arithmetic number, because the mean of its divisors is an integer number (958432384).

Almost surely, 2^19530841812 is an apocalyptic number.

19530841812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19530841812 is an abundant number, since it is smaller than the sum of its proper divisors (26473912620).

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

19530841812 is a wasteful number, since it uses less digits than its factorization.

19530841812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20768 (or 20766 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 19530841812 in words is "nineteen billion, five hundred thirty million, eight hundred forty-one thousand, eight hundred twelve".