19908650516 has 24 divisors (see below), whose sum is σ = 35013724200. Its totient is φ = 9904788992.

The previous prime is 19908650473. The next prime is 19908650519. The reversal of 19908650516 is 61505680991.

It can be written as a sum of positive squares in 4 ways, for example, as 26522500 + 19882128016 = 5150^2 + 141004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19908650519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1519160 + ... + 1532208.

It is an arithmetic number, because the mean of its divisors is an integer number (1458905175).

Almost surely, 2^19908650516 is an apocalyptic number.

It is an amenable number.

19908650516 is a deficient number, since it is larger than the sum of its proper divisors (15105073684).

19908650516 is a wasteful number, since it uses less digits than its factorization.

19908650516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14923 (or 14921 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 50.

The spelling of 19908650516 in words is "nineteen billion, nine hundred eight million, six hundred fifty thousand, five hundred sixteen".