203120780 has 12 divisors (see below), whose sum is σ = 426553680. Its totient is φ = 81248304.

The previous prime is 203120767. The next prime is 203120783. The reversal of 203120780 is 87021302.

It is not an unprimeable number, because it can be changed into a prime (203120783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5078000 + ... + 5078039.

It is an arithmetic number, because the mean of its divisors is an integer number (35546140).

Almost surely, 2^203120780 is an apocalyptic number.

203120780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203120780 is an abundant number, since it is smaller than the sum of its proper divisors (223432900).

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

203120780 is a wasteful number, since it uses less digits than its factorization.

203120780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10156048 (or 10156046 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 203120780 is about 14252.0447655766. The cubic root of 203120780 is about 587.8296010785.

The spelling of 203120780 in words is "two hundred three million, one hundred twenty thousand, seven hundred eighty".