20042052500 has 60 divisors (see below), whose sum is σ = 43891765764. Its totient is φ = 8005152000.

The previous prime is 20042052491. The next prime is 20042052517. The reversal of 20042052500 is 525024002.

It can be written as a sum of positive squares in 10 ways, for example, as 3999803536 + 16042248964 = 63244^2 + 126658^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1827032 + ... + 1837968.

Almost surely, 2^20042052500 is an apocalyptic number.

20042052500 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 20042052500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21945882882).

20042052500 is an abundant number, since it is smaller than the sum of its proper divisors (23849713264).

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

20042052500 is a wasteful number, since it uses less digits than its factorization.

20042052500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11694 (or 11677 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

Adding to 20042052500 its reverse (525024002), we get a palindrome (20567076502).

The spelling of 20042052500 in words is "twenty billion, forty-two million, fifty-two thousand, five hundred".