1320266020 has 12 divisors (see below), whose sum is σ = 2772558684. Its totient is φ = 528106400.

The previous prime is 1320265981. The next prime is 1320266027. The reversal of 1320266020 is 206620231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 594286884 + 725979136 = 24378^2 + 26944^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1320265982 and 1320266000.

It is not an unprimeable number, because it can be changed into a prime (1320266027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33006631 + ... + 33006670.

It is an arithmetic number, because the mean of its divisors is an integer number (231046557).

Almost surely, 2^1320266020 is an apocalyptic number.

1320266020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320266020 is an abundant number, since it is smaller than the sum of its proper divisors (1452292664).

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

1320266020 is a wasteful number, since it uses less digits than its factorization.

1320266020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66013310 (or 66013308 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1320266020 is about 36335.4650444989. The cubic root of 1320266020 is about 1097.0349958519.

Adding to 1320266020 its reverse (206620231), we get a palindrome (1526886251).

The spelling of 1320266020 in words is "one billion, three hundred twenty million, two hundred sixty-six thousand, twenty".