20403424000 has 72 divisors (see below), whose sum is σ = 50827559328. Its totient is φ = 8161356800.

The previous prime is 20403423983. The next prime is 20403424001. The reversal of 20403424000 is 42430402.

It is not an unprimeable number, because it can be changed into a prime (20403424001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286804 + ... + 350803.

It is an arithmetic number, because the mean of its divisors is an integer number (705938324).

Almost surely, 2^20403424000 is an apocalyptic number.

20403424000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20403424000 is an abundant number, since it is smaller than the sum of its proper divisors (30424135328).

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

20403424000 is an frugal number, since it uses more digits than its factorization.

20403424000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637638 (or 637614 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20403424000 its reverse (42430402), we get a palindrome (20445854402).

The spelling of 20403424000 in words is "twenty billion, four hundred three million, four hundred twenty-four thousand".