193918812 has 12 divisors (see below), whose sum is σ = 452477256. Its totient is φ = 64639600.

The previous prime is 193918801. The next prime is 193918831. The reversal of 193918812 is 218819391.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8079939 + ... + 8079962.

It is an arithmetic number, because the mean of its divisors is an integer number (37706438).

Almost surely, 2^193918812 is an apocalyptic number.

193918812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

193918812 is an abundant number, since it is smaller than the sum of its proper divisors (258558444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

193918812 is a wasteful number, since it uses less digits than its factorization.

193918812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16159908 (or 16159906 counting only the distinct ones).

The product of its digits is 31104, while the sum is 42.

The square root of 193918812 is about 13925.4734928476. The cubic root of 193918812 is about 578.8152709359.

It can be divided in two parts, 19391 and 8812, that added together give a triangular number (28203 = T₂₃₇).

The spelling of 193918812 in words is "one hundred ninety-three million, nine hundred eighteen thousand, eight hundred twelve".