12203906450 has 54 divisors (see below), whose sum is σ = 24139328031. Its totient is φ = 4589412480.

The previous prime is 12203906443. The next prime is 12203906453. The reversal of 12203906450 is 5460930221.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 7946474449 + 4257432001 = 89143^2 + 65249^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78115.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12203906453) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13279091 + ... + 13280009.

Almost surely, 2^12203906450 is an apocalyptic number.

12203906450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12203906450 is a deficient number, since it is larger than the sum of its proper divisors (11935421581).

12203906450 is an frugal number, since it uses more digits than its factorization.

12203906450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

Multiplying 12203906450 by its sum of digits (32), we get a square (390525006400 = 624920²).

The spelling of 12203906450 in words is "twelve billion, two hundred three million, nine hundred six thousand, four hundred fifty".