19459018556 has 24 divisors (see below), whose sum is σ = 35178963456. Its totient is φ = 9408371760.

The previous prime is 19459018543. The next prime is 19459018561. The reversal of 19459018556 is 65581095491.

It is a junction number, because it is equal to n+sod(n) for n = 19459018498 and 19459018507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102035 + ... + 222101.

It is an arithmetic number, because the mean of its divisors is an integer number (1465790144).

Almost surely, 2^19459018556 is an apocalyptic number.

It is an amenable number.

19459018556 is a deficient number, since it is larger than the sum of its proper divisors (15719944900).

19459018556 is a wasteful number, since it uses less digits than its factorization.

19459018556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121409 (or 121407 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 53.

The spelling of 19459018556 in words is "nineteen billion, four hundred fifty-nine million, eighteen thousand, five hundred fifty-six".