20004024400 has 30 divisors (see below), whose sum is σ = 48059669582. Its totient is φ = 8001609600.

The previous prime is 20004024377. The next prime is 20004024401. The reversal of 20004024400 is 442040002.

It can be written as a sum of positive squares in 3 ways, for example, as 393943104 + 19610081296 = 19848^2 + 140036^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004024401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25004631 + ... + 25005430.

Almost surely, 2^20004024400 is an apocalyptic number.

20004024400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20004024400 is an abundant number, since it is smaller than the sum of its proper divisors (28055645182).

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

20004024400 is a wasteful number, since it uses less digits than its factorization.

20004024400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50010079 (or 50010068 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20004024400 its reverse (442040002), we get a palindrome (20446064402).

The spelling of 20004024400 in words is "twenty billion, four million, twenty-four thousand, four hundred".