20519853916 has 12 divisors (see below), whose sum is σ = 35990807832. Its totient is φ = 10236765968.

The previous prime is 20519853911. The next prime is 20519853929. The reversal of 20519853916 is 61935891502.

It is a self number, because there is not a number n which added to its sum of digits gives 20519853916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20519853911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5788255 + ... + 5791798.

It is an arithmetic number, because the mean of its divisors is an integer number (2999233986).

Almost surely, 2^20519853916 is an apocalyptic number.

It is an amenable number.

20519853916 is a deficient number, since it is larger than the sum of its proper divisors (15470953916).

20519853916 is a wasteful number, since it uses less digits than its factorization.

20519853916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11580500 (or 11580498 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 49.

The spelling of 20519853916 in words is "twenty billion, five hundred nineteen million, eight hundred fifty-three thousand, nine hundred sixteen".