203140400220 has 144 divisors (see below), whose sum is σ = 628109681472. Its totient is φ = 53124065280.

The previous prime is 203140400149. The next prime is 203140400233. The reversal of 203140400220 is 22004041302.

203140400220 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 40 + 400 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 203140400193 and 203140400202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30438804 + ... + 30445476.

It is an arithmetic number, because the mean of its divisors is an integer number (4361872788).

Almost surely, 2^203140400220 is an apocalyptic number.

203140400220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203140400220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314054840736).

203140400220 is an abundant number, since it is smaller than the sum of its proper divisors (424969281252).

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

203140400220 is a wasteful number, since it uses less digits than its factorization.

203140400220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9932 (or 9927 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 203140400220 its reverse (22004041302), we get a palindrome (225144441522).

The spelling of 203140400220 in words is "two hundred three billion, one hundred forty million, four hundred thousand, two hundred twenty".