203091940 has 12 divisors (see below), whose sum is σ = 426493116. Its totient is φ = 81236768.

The previous prime is 203091929. The next prime is 203091947. The reversal of 203091940 is 49190302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77158656 + 125933284 = 8784^2 + 11222^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203091899 and 203091908.

It is not an unprimeable number, because it can be changed into a prime (203091947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5077279 + ... + 5077318.

It is an arithmetic number, because the mean of its divisors is an integer number (35541093).

Almost surely, 2^203091940 is an apocalyptic number.

203091940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203091940 is an abundant number, since it is smaller than the sum of its proper divisors (223401176).

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

203091940 is a wasteful number, since it uses less digits than its factorization.

203091940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10154606 (or 10154604 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 203091940 is about 14251.0329450184. The cubic root of 203091940 is about 587.8017788666.

The spelling of 203091940 in words is "two hundred three million, ninety-one thousand, nine hundred forty".