19487097542 has 16 divisors (see below), whose sum is σ = 32665734864. Its totient is φ = 8641728000.

The previous prime is 19487097529. The next prime is 19487097571. The reversal of 19487097542 is 24579078491.

It is a happy number.

It is a super-2 number, since 2×19487097542² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 10801259 + ... + 10803062.

It is an arithmetic number, because the mean of its divisors is an integer number (2041608429).

Almost surely, 2^19487097542 is an apocalyptic number.

19487097542 is a deficient number, since it is larger than the sum of its proper divisors (13178637322).

19487097542 is a wasteful number, since it uses less digits than its factorization.

19487097542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21604375.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 19487097542 in words is "nineteen billion, four hundred eighty-seven million, ninety-seven thousand, five hundred forty-two".