19487729936 has 10 divisors (see below), whose sum is σ = 37757476782. Its totient is φ = 9743864960.

The previous prime is 19487729929. The next prime is 19487729959. The reversal of 19487729936 is 63992778491.

It can be written as a sum of positive squares in only one way, i.e., 19421209600 + 66520336 = 139360^2 + 8156^2 .

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 as a sum of consecutive naturals, namely, 608991545 + ... + 608991576.

Almost surely, 2^19487729936 is an apocalyptic number.

19487729936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19487729936 is a deficient number, since it is larger than the sum of its proper divisors (18269746846).

19487729936 is a wasteful number, since it uses less digits than its factorization.

19487729936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217983129 (or 1217983123 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 65.

The spelling of 19487729936 in words is "nineteen billion, four hundred eighty-seven million, seven hundred twenty-nine thousand, nine hundred thirty-six".