20808062500 has 63 divisors (see below), whose sum is σ = 45596076519. Its totient is φ = 8308800000.

The previous prime is 20808062417. The next prime is 20808062501. The reversal of 20808062500 is 526080802.

The square root of 20808062500 is 144250.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 10 ways, for example, as 19258223076 + 1549839424 = 138774^2 + 39368^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20808062501) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 36062212 + ... + 36062788.

Almost surely, 2^20808062500 is an apocalyptic number.

20808062500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

20808062500 is the 144250-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20808062500

20808062500 is an abundant number, since it is smaller than the sum of its proper divisors (24788014019).

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

20808062500 is an frugal number, since it uses more digits than its factorization.

20808062500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 20808062500 in words is "twenty billion, eight hundred eight million, sixty-two thousand, five hundred".