196819998428 has 24 divisors (see below), whose sum is σ = 366191769888. Its totient is φ = 92355238976.

The previous prime is 196819998407. The next prime is 196819998433. The reversal of 196819998428 is 824899918691.

196819998428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×196819998428² (a number of 23 digits) contains 22 as substring.

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, 20177651 + ... + 20187402.

It is an arithmetic number, because the mean of its divisors is an integer number (15257990412).

Almost surely, 2^196819998428 is an apocalyptic number.

It is an amenable number.

196819998428 is a deficient number, since it is larger than the sum of its proper divisors (169371771460).

196819998428 is a wasteful number, since it uses less digits than its factorization.

196819998428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40365133 (or 40365131 counting only the distinct ones).

The product of its digits is 161243136, while the sum is 74.

The spelling of 196819998428 in words is "one hundred ninety-six billion, eight hundred nineteen million, nine hundred ninety-eight thousand, four hundred twenty-eight".