1365320020 has 48 divisors (see below), whose sum is σ = 3021556608. Its totient is φ = 517193600.

The previous prime is 1365319987. The next prime is 1365320039. The reversal of 1365320020 is 200235631.

It is a junction number, because it is equal to n+sod(n) for n = 1365319973 and 1365320000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31767 + ... + 61153.

It is an arithmetic number, because the mean of its divisors is an integer number (62949096).

Almost surely, 2^1365320020 is an apocalyptic number.

1365320020 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 1365320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1510778304).

1365320020 is an abundant number, since it is smaller than the sum of its proper divisors (1656236588).

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

1365320020 is a wasteful number, since it uses less digits than its factorization.

1365320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29520 (or 29518 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1365320020 is about 36950.2370763707. The cubic root of 1365320020 is about 1109.3744331095.

Adding to 1365320020 its reverse (200235631), we get a palindrome (1565555651).

The spelling of 1365320020 in words is "one billion, three hundred sixty-five million, three hundred twenty thousand, twenty".