19516877428 has 12 divisors (see below), whose sum is σ = 34193047392. Its totient is φ = 9747435320.

The previous prime is 19516877423. The next prime is 19516877473. The reversal of 19516877428 is 82477861591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19516877423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2746858 + ... + 2753953.

It is an arithmetic number, because the mean of its divisors is an integer number (2849420616).

Almost surely, 2^19516877428 is an apocalyptic number.

It is an amenable number.

19516877428 is a deficient number, since it is larger than the sum of its proper divisors (14676169964).

19516877428 is a wasteful number, since it uses less digits than its factorization.

19516877428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5501702 (or 5501700 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 58.

The spelling of 19516877428 in words is "nineteen billion, five hundred sixteen million, eight hundred seventy-seven thousand, four hundred twenty-eight".