19430520492 has 24 divisors (see below), whose sum is σ = 46901257200. Its totient is φ = 6253500736.

The previous prime is 19430520457. The next prime is 19430520493. The reversal of 19430520492 is 29402503491.

It is a self number, because there is not a number n which added to its sum of digits gives 19430520492.

It is not an unprimeable number, because it can be changed into a prime (19430520493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27917067 + ... + 27917762.

It is an arithmetic number, because the mean of its divisors is an integer number (1954219050).

Almost surely, 2^19430520492 is an apocalyptic number.

19430520492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19430520492 is an abundant number, since it is smaller than the sum of its proper divisors (27470736708).

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

19430520492 is a wasteful number, since it uses less digits than its factorization.

19430520492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55834865 (or 55834863 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 19430520492 in words is "nineteen billion, four hundred thirty million, five hundred twenty thousand, four hundred ninety-two".