19209046542 has 24 divisors (see below), whose sum is σ = 44690435496. Its totient is φ = 5488298928.

The previous prime is 19209046537. The next prime is 19209046561. The reversal of 19209046542 is 24564090291.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 19209046494 and 19209046503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32668153 + ... + 32668740.

It is an arithmetic number, because the mean of its divisors is an integer number (1862101479).

Almost surely, 2^19209046542 is an apocalyptic number.

19209046542 is an abundant number, since it is smaller than the sum of its proper divisors (25481388954).

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

19209046542 is a wasteful number, since it uses less digits than its factorization.

19209046542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65336912 (or 65336905 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 19209046542 in words is "nineteen billion, two hundred nine million, forty-six thousand, five hundred forty-two".