40021310320 has 40 divisors (see below), whose sum is σ = 95319055440. Its totient is φ = 15618071040.

The previous prime is 40021310311. The next prime is 40021310353. The reversal of 40021310320 is 2301312004.

It is a happy number.

40021310320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 40021310294 and 40021310303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6097530 + ... + 6104089.

It is an arithmetic number, because the mean of its divisors is an integer number (2382976386).

Almost surely, 2^40021310320 is an apocalyptic number.

40021310320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40021310320 is an abundant number, since it is smaller than the sum of its proper divisors (55297745120).

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

40021310320 is a wasteful number, since it uses less digits than its factorization.

40021310320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12201673 (or 12201667 counting only the distinct ones).

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

Adding to 40021310320 its reverse (2301312004), we get a palindrome (42322622324).

The spelling of 40021310320 in words is "forty billion, twenty-one million, three hundred ten thousand, three hundred twenty".