203451345220 has 48 divisors (see below), whose sum is σ = 441145152000. Its totient is φ = 78734799360.

The previous prime is 203451345197. The next prime is 203451345239. The reversal of 203451345220 is 22543154302.

203451345220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-5 number, since 5×203451345220⁵ (a number of 58 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2450956 + ... + 2532604.

It is an arithmetic number, because the mean of its divisors is an integer number (9190524000).

Almost surely, 2^203451345220 is an apocalyptic number.

203451345220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203451345220 is an abundant number, since it is smaller than the sum of its proper divisors (237693806780).

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

203451345220 is a wasteful number, since it uses less digits than its factorization.

203451345220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85708 (or 85706 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 203451345220 its reverse (22543154302), we get a palindrome (225994499522).

The spelling of 203451345220 in words is "two hundred three billion, four hundred fifty-one million, three hundred forty-five thousand, two hundred twenty".