10321320040 has 16 divisors (see below), whose sum is σ = 23222970180. Its totient is φ = 4128528000.

The previous prime is 10321320029. The next prime is 10321320071. The reversal of 10321320040 is 4002312301.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10281554404 + 39765636 = 101398^2 + 6306^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10321319996 and 10321320023.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129016461 + ... + 129016540.

Almost surely, 2^10321320040 is an apocalyptic number.

10321320040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10321320040 is an abundant number, since it is smaller than the sum of its proper divisors (12901650140).

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

10321320040 is a wasteful number, since it uses less digits than its factorization.

10321320040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258033012 (or 258033008 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 10321320040 its reverse (4002312301), we get a palindrome (14323632341).

The spelling of 10321320040 in words is "ten billion, three hundred twenty-one million, three hundred twenty thousand, forty".