1203323420 has 48 divisors (see below), whose sum is σ = 2726659488. Its totient is φ = 443439360.

The previous prime is 1203323413. The next prime is 1203323423. The reversal of 1203323420 is 243233021.

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 = 1203323392 and 1203323401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203323423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137990 + ... + 146450.

It is an arithmetic number, because the mean of its divisors is an integer number (56805406).

Almost surely, 2^1203323420 is an apocalyptic number.

1203323420 is a gapful number since it is divisible by the number (10) 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 1203323420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363329744).

1203323420 is an abundant number, since it is smaller than the sum of its proper divisors (1523336068).

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

1203323420 is a wasteful number, since it uses less digits than its factorization.

1203323420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9030 (or 9028 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 1203323420 is about 34688.9524200429. The cubic root of 1203323420 is about 1063.6386817987.

Adding to 1203323420 its reverse (243233021), we get a palindrome (1446556441).

It can be divided in two parts, 12033 and 23420, that added together give a palindrome (35453).

The spelling of 1203323420 in words is "one billion, two hundred three million, three hundred twenty-three thousand, four hundred twenty".