19512635442 has 32 divisors (see below), whose sum is σ = 42126238080. Its totient is φ = 6006887040.

The previous prime is 19512635437. The next prime is 19512635477. The reversal of 19512635442 is 24453621591.

It is a junction number, because it is equal to n+sod(n) for n = 19512635394 and 19512635403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2433859 + ... + 2441862.

It is an arithmetic number, because the mean of its divisors is an integer number (1316444940).

Almost surely, 2^19512635442 is an apocalyptic number.

19512635442 is an abundant number, since it is smaller than the sum of its proper divisors (22613602638).

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

19512635442 is a wasteful number, since it uses less digits than its factorization.

19512635442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4875778.

The product of its digits is 259200, while the sum is 42.

The spelling of 19512635442 in words is "nineteen billion, five hundred twelve million, six hundred thirty-five thousand, four hundred forty-two".