203994343278 has 96 divisors (see below), whose sum is σ = 490596238080. Its totient is φ = 60737080320.

The previous prime is 203994343261. The next prime is 203994343313. The reversal of 203994343278 is 872343499302.

203994343278 is a `hidden beast` number, since 20 + 3 + 9 + 9 + 4 + 343 + 278 = 666.

It is a super-2 number, since 2×203994343278² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32157375 + ... + 32163717.

It is an arithmetic number, because the mean of its divisors is an integer number (5110377480).

Almost surely, 2^203994343278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203994343278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245298119040).

203994343278 is an abundant number, since it is smaller than the sum of its proper divisors (286601894802).

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

203994343278 is a wasteful number, since it uses less digits than its factorization.

203994343278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9174 (or 9171 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 203994343278 in words is "two hundred three billion, nine hundred ninety-four million, three hundred forty-three thousand, two hundred seventy-eight".