1320223020 has 48 divisors (see below), whose sum is σ = 3698200800. Its totient is φ = 351909376.

The previous prime is 1320223019. The next prime is 1320223027. The reversal of 1320223020 is 203220231.

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

It is not an unprimeable number, because it can be changed into a prime (1320223027) 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, 276574 + ... + 281306.

It is an arithmetic number, because the mean of its divisors is an integer number (77045850).

Almost surely, 2^1320223020 is an apocalyptic number.

1320223020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320223020 is an abundant number, since it is smaller than the sum of its proper divisors (2377977780).

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

1320223020 is a wasteful number, since it uses less digits than its factorization.

1320223020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9394 (or 9392 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1320223020 is about 36334.8733312778. The cubic root of 1320223020 is about 1097.0230858741.

Adding to 1320223020 its reverse (203220231), we get a palindrome (1523443251).

The spelling of 1320223020 in words is "one billion, three hundred twenty million, two hundred twenty-three thousand, twenty".