1204321020 has 192 divisors, whose sum is σ = 3970176000. Its totient is φ = 272643840.

The previous prime is 1204320983. The next prime is 1204321037. The reversal of 1204321020 is 201234021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2860410 + ... + 2860830.

It is an arithmetic number, because the mean of its divisors is an integer number (20678000).

Almost surely, 2^1204321020 is an apocalyptic number.

1204321020 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 1204321020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1985088000).

1204321020 is an abundant number, since it is smaller than the sum of its proper divisors (2765854980).

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

1204321020 is a wasteful number, since it uses less digits than its factorization.

1204321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1204321020 is about 34703.3286587901. The cubic root of 1204321020 is about 1063.9325326565.

Adding to 1204321020 its reverse (201234021), we get a palindrome (1405555041).

The spelling of 1204321020 in words is "one billion, two hundred four million, three hundred twenty-one thousand, twenty".