12203502820 has 24 divisors (see below), whose sum is σ = 25633166328. Its totient is φ = 4880294400.

The previous prime is 12203502797. The next prime is 12203502821. The reversal of 12203502820 is 2820530221.

It can be written as a sum of positive squares in 4 ways, for example, as 2192299684 + 10011203136 = 46822^2 + 100056^2 .

It is not an unprimeable number, because it can be changed into a prime (12203502821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24330 + ... + 158110.

It is an arithmetic number, because the mean of its divisors is an integer number (1068048597).

Almost surely, 2^12203502820 is an apocalyptic number.

12203502820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12203502820 is an abundant number, since it is smaller than the sum of its proper divisors (13429663508).

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

12203502820 is a wasteful number, since it uses less digits than its factorization.

12203502820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138351 (or 138349 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 12203502820 in words is "twelve billion, two hundred three million, five hundred two thousand, eight hundred twenty".