19887213152 has 48 divisors (see below), whose sum is σ = 39588428880. Its totient is φ = 9833177088.

The previous prime is 19887213149. The next prime is 19887213167. The reversal of 19887213152 is 25131278891.

It is a junction number, because it is equal to n+sod(n) for n = 19887213097 and 19887213106.

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, 6482723 + ... + 6485789.

It is an arithmetic number, because the mean of its divisors is an integer number (824758935).

Almost surely, 2^19887213152 is an apocalyptic number.

It is an amenable number.

19887213152 is a deficient number, since it is larger than the sum of its proper divisors (19701215728).

19887213152 is a wasteful number, since it uses less digits than its factorization.

19887213152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263 (or 5255 counting only the distinct ones).

The product of its digits is 241920, while the sum is 47.

The spelling of 19887213152 in words is "nineteen billion, eight hundred eighty-seven million, two hundred thirteen thousand, one hundred fifty-two".