19662698428 has 12 divisors (see below), whose sum is σ = 34414668232. Its totient is φ = 9829936080.

The previous prime is 19662698417. The next prime is 19662698449. The reversal of 19662698428 is 82489626691.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321663 + ... + 377878.

Almost surely, 2^19662698428 is an apocalyptic number.

It is an amenable number.

19662698428 is a deficient number, since it is larger than the sum of its proper divisors (14751969804).

19662698428 is a wasteful number, since it uses less digits than its factorization.

19662698428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706572 (or 706570 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 61.

The spelling of 19662698428 in words is "nineteen billion, six hundred sixty-two million, six hundred ninety-eight thousand, four hundred twenty-eight".