20523334400 has 108 divisors (see below), whose sum is σ = 50856453312. Its totient is φ = 8199966720.

The previous prime is 20523334369. The next prime is 20523334487. The reversal of 20523334400 is 443332502.

It is a self number, because there is not a number n which added to its sum of digits gives 20523334400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9298097 + ... + 9300303.

Almost surely, 2^20523334400 is an apocalyptic number.

20523334400 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 20523334400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25428226656).

20523334400 is an abundant number, since it is smaller than the sum of its proper divisors (30333118912).

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

20523334400 is a wasteful number, since it uses less digits than its factorization.

20523334400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686 (or 3667 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 26.

Adding to 20523334400 its reverse (443332502), we get a palindrome (20966666902).

The spelling of 20523334400 in words is "twenty billion, five hundred twenty-three million, three hundred thirty-four thousand, four hundred".