20603731600 has 45 divisors (see below), whose sum is σ = 49507363227. Its totient is φ = 8240344320.

The previous prime is 20603731571. The next prime is 20603731601. The reversal of 20603731600 is 613730602.

The square root of 20603731600 is 143540.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2878537104 + 17725194496 = 53652^2 + 133136^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20603731601) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 2867212 + ... + 2874388.

Almost surely, 2^20603731600 is an apocalyptic number.

20603731600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

20603731600 is the 143540-th square number.

It is an amenable number.

20603731600 is an abundant number, since it is smaller than the sum of its proper divisors (28903631627).

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

20603731600 is an frugal number, since it uses more digits than its factorization.

20603731600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14372 (or 7184 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The spelling of 20603731600 in words is "twenty billion, six hundred three million, seven hundred thirty-one thousand, six hundred".