40021301320 has 512 divisors, whose sum is σ = 131449651200. Its totient is φ = 10550476800.

The previous prime is 40021301293. The next prime is 40021301323. The reversal of 40021301320 is 2310312004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40021301294 and 40021301303.

It is not an unprimeable number, because it can be changed into a prime (40021301323) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 23582712 + ... + 23584408.

It is an arithmetic number, because the mean of its divisors is an integer number (256737600).

Almost surely, 2^40021301320 is an apocalyptic number.

40021301320 is a gapful number since it is divisible by the number (40) 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 40021301320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65724825600).

40021301320 is an abundant number, since it is smaller than the sum of its proper divisors (91428349880).

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

40021301320 is a wasteful number, since it uses less digits than its factorization.

40021301320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789 (or 1785 counting only the distinct ones).

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

Adding to 40021301320 its reverse (2310312004), we get a palindrome (42331613324).

The spelling of 40021301320 in words is "forty billion, twenty-one million, three hundred one thousand, three hundred twenty".