188420619892 has 48 divisors (see below), whose sum is σ = 355127492160. Its totient is φ = 87158592000.

The previous prime is 188420619857. The next prime is 188420619917. The reversal of 188420619892 is 298916024881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855967 + ... + 1053337.

It is an arithmetic number, because the mean of its divisors is an integer number (7398489420).

Almost surely, 2^188420619892 is an apocalyptic number.

It is an amenable number.

188420619892 is a deficient number, since it is larger than the sum of its proper divisors (166706872268).

188420619892 is a wasteful number, since it uses less digits than its factorization.

188420619892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197632 (or 197630 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 58.

The spelling of 188420619892 in words is "one hundred eighty-eight billion, four hundred twenty million, six hundred nineteen thousand, eight hundred ninety-two".