19870330136 has 8 divisors (see below), whose sum is σ = 37256869020. Its totient is φ = 9935165064.

The previous prime is 19870330063. The next prime is 19870330141. The reversal of 19870330136 is 63103307891.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 19870330093 and 19870330102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1241895626 + ... + 1241895641.

Almost surely, 2^19870330136 is an apocalyptic number.

It is an amenable number.

19870330136 is a deficient number, since it is larger than the sum of its proper divisors (17386538884).

19870330136 is a wasteful number, since it uses less digits than its factorization.

19870330136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483791273 (or 2483791269 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 19870330136 in words is "nineteen billion, eight hundred seventy million, three hundred thirty thousand, one hundred thirty-six".