19487432428 has 6 divisors (see below), whose sum is σ = 34103006756. Its totient is φ = 9743716212.

The previous prime is 19487432407. The next prime is 19487432453. The reversal of 19487432428 is 82423478491.

It is a super-3 number, since 3×19487432428³ (a number of 32 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 2435929050 + ... + 2435929057.

Almost surely, 2^19487432428 is an apocalyptic number.

It is an amenable number.

19487432428 is a deficient number, since it is larger than the sum of its proper divisors (14615574328).

19487432428 is a wasteful number, since it uses less digits than its factorization.

19487432428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871858111 (or 4871858109 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 52.

The spelling of 19487432428 in words is "nineteen billion, four hundred eighty-seven million, four hundred thirty-two thousand, four hundred twenty-eight".