1320000000020 has 48 divisors (see below), whose sum is σ = 3088169778960. Its totient is φ = 470578246656.

The previous prime is 1320000000019. The next prime is 1320000000023. The reversal of 1320000000020 is 200000000231.

It can be written as a sum of positive squares in 8 ways, for example, as 134240166544 + 1185759833476 = 366388^2 + 1088926^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1319999999935 and 1320000000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320000000023) 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, 87525617 + ... + 87540696.

It is an arithmetic number, because the mean of its divisors is an integer number (64336870395).

Almost surely, 2^{1320000000020} is an apocalyptic number.

1320000000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320000000020 is an abundant number, since it is smaller than the sum of its proper divisors (1768169778940).

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

1320000000020 is a wasteful number, since it uses less digits than its factorization.

1320000000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175066364 (or 175066362 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

Adding to 1320000000020 its reverse (200000000231), we get a palindrome (1520000000251).

The spelling of 1320000000020 in words is "one trillion, three hundred twenty billion, twenty", and thus it is an aban number.