19215785452 has 12 divisors (see below), whose sum is σ = 33632167240. Its totient is φ = 9606594816.

The previous prime is 19215785441. The next prime is 19215785467. The reversal of 19215785452 is 25458751291.

It is a junction number, because it is equal to n+sod(n) for n = 19215785396 and 19215785405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290778 + ... + 350689.

Almost surely, 2^19215785452 is an apocalyptic number.

It is an amenable number.

19215785452 is a deficient number, since it is larger than the sum of its proper divisors (14416381788).

19215785452 is a wasteful number, since it uses less digits than its factorization.

19215785452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648960 (or 648958 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 49.

The spelling of 19215785452 in words is "nineteen billion, two hundred fifteen million, seven hundred eighty-five thousand, four hundred fifty-two".