20355040000 has 90 divisors (see below), whose sum is σ = 50772357020. Its totient is φ = 8141952000.

The previous prime is 20355039973. The next prime is 20355040003. The reversal of 20355040000 is 4055302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20355040000.

It is not an unprimeable number, because it can be changed into a prime (20355040003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 96391 + ... + 223609.

Almost surely, 2^20355040000 is an apocalyptic number.

20355040000 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 20355040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25386178510).

20355040000 is an abundant number, since it is smaller than the sum of its proper divisors (30417317020).

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

20355040000 is an frugal number, since it uses more digits than its factorization.

20355040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127255 (or 127226 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

Adding to 20355040000 its reverse (4055302), we get a palindrome (20359095302).

The spelling of 20355040000 in words is "twenty billion, three hundred fifty-five million, forty thousand".