203212440020 has 48 divisors (see below), whose sum is σ = 450876585600. Its totient is φ = 76720510080.

The previous prime is 203212439987. The next prime is 203212440029. The reversal of 203212440020 is 20044212302.

203212440020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 203212439974 and 203212440001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203212440029) by changing a digit.

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, 891776 + ... + 1096215.

It is an arithmetic number, because the mean of its divisors is an integer number (9393262200).

Almost surely, 2^203212440020 is an apocalyptic number.

203212440020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203212440020 is an abundant number, since it is smaller than the sum of its proper divisors (247664145580).

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

203212440020 is a wasteful number, since it uses less digits than its factorization.

203212440020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988288 (or 1988286 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 203212440020 its reverse (20044212302), we get a palindrome (223256652322).

The spelling of 203212440020 in words is "two hundred three billion, two hundred twelve million, four hundred forty thousand, twenty".