20323046040 has 128 divisors (see below), whose sum is σ = 66576556800. Its totient is φ = 4922001920.

The previous prime is 20323046027. The next prime is 20323046041. The reversal of 20323046040 is 4064032302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20323046040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323046041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1456939 + ... + 1470821.

It is an arithmetic number, because the mean of its divisors is an integer number (520129350).

Almost surely, 2^20323046040 is an apocalyptic number.

20323046040 is a gapful number since it is divisible by the number (20) 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 20323046040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33288278400).

20323046040 is an abundant number, since it is smaller than the sum of its proper divisors (46253510760).

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

20323046040 is a wasteful number, since it uses less digits than its factorization.

20323046040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15017 (or 15013 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20323046040 its reverse (4064032302), we get a palindrome (24387078342).

The spelling of 20323046040 in words is "twenty billion, three hundred twenty-three million, forty-six thousand, forty".