1013321320 has 32 divisors (see below), whose sum is σ = 2487244320. Its totient is φ = 368480320.

The previous prime is 1013321317. The next prime is 1013321321. The reversal of 1013321320 is 231233101.

It is a junction number, because it is equal to n+sod(n) for n = 1013321294 and 1013321303.

It is not an unprimeable number, because it can be changed into a prime (1013321321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1151062 + ... + 1151941.

It is an arithmetic number, because the mean of its divisors is an integer number (77726385).

Almost surely, 2^1013321320 is an apocalyptic number.

1013321320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1013321320 is an abundant number, since it is smaller than the sum of its proper divisors (1473923000).

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

1013321320 is a wasteful number, since it uses less digits than its factorization.

1013321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303025 (or 2303021 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1013321320 is about 31832.7083359239. The cubic root of 1013321320 is about 1004.4208671332.

Adding to 1013321320 its reverse (231233101), we get a palindrome (1244554421).

The spelling of 1013321320 in words is "one billion, thirteen million, three hundred twenty-one thousand, three hundred twenty".