20354043040 has 96 divisors (see below), whose sum is σ = 48451011840. Its totient is φ = 8080149504.

The previous prime is 20354042983. The next prime is 20354043041. The reversal of 20354043040 is 4034045302.

It is a junction number, because it is equal to n+sod(n) for n = 20354042996 and 20354043014.

It is not an unprimeable number, because it can be changed into a prime (20354043041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14262807 + ... + 14264233.

It is an arithmetic number, because the mean of its divisors is an integer number (504698040).

Almost surely, 2^20354043040 is an apocalyptic number.

20354043040 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 20354043040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24225505920).

20354043040 is an abundant number, since it is smaller than the sum of its proper divisors (28096968800).

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

20354043040 is a wasteful number, since it uses less digits than its factorization.

20354043040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054 (or 2046 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

Adding to 20354043040 its reverse (4034045302), we get a palindrome (24388088342).

The spelling of 20354043040 in words is "twenty billion, three hundred fifty-four million, forty-three thousand, forty".