19886653450 has 48 divisors (see below), whose sum is σ = 38203697664. Its totient is φ = 7693761600.

The previous prime is 19886653447. The next prime is 19886653463. The reversal of 19886653450 is 5435668891.

It is a junction number, because it is equal to n+sod(n) for n = 19886653391 and 19886653400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5511547 + ... + 5515153.

It is an arithmetic number, because the mean of its divisors is an integer number (795910368).

Almost surely, 2^19886653450 is an apocalyptic number.

19886653450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19886653450 is a deficient number, since it is larger than the sum of its proper divisors (18317044214).

19886653450 is a wasteful number, since it uses less digits than its factorization.

19886653450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7207 (or 7202 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 19886653450 in words is "nineteen billion, eight hundred eighty-six million, six hundred fifty-three thousand, four hundred fifty".