198812931700 has 18 divisors (see below), whose sum is σ = 431424062006. Its totient is φ = 79525172640.

The previous prime is 198812931659. The next prime is 198812931701. The reversal of 198812931700 is 7139218891.

It can be written as a sum of positive squares in 3 ways, for example, as 5740816 + 198807190884 = 2396^2 + 445878^2 .

It is a super-2 number, since 2×198812931700² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198812931701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 994064559 + ... + 994064758.

Almost surely, 2^198812931700 is an apocalyptic number.

198812931700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198812931700 is an abundant number, since it is smaller than the sum of its proper divisors (232611130306).

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

198812931700 is a wasteful number, since it uses less digits than its factorization.

198812931700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988129331 (or 1988129324 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 49.

The spelling of 198812931700 in words is "one hundred ninety-eight billion, eight hundred twelve million, nine hundred thirty-one thousand, seven hundred".