20111350225 has 12 divisors (see below), whose sum is σ = 24940105740. Its totient is φ = 16087769600.

The previous prime is 20111350219. The next prime is 20111350279. The reversal of 20111350225 is 52205311102.

It can be written as a sum of positive squares in 6 ways, for example, as 230068224 + 19881282001 = 15168^2 + 141001^2 .

It is not a de Polignac number, because 20111350225 - 2⁷ = 20111350097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20111350196 and 20111350205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384441 + ... + 433609.

It is an arithmetic number, because the mean of its divisors is an integer number (2078342145).

Almost surely, 2^20111350225 is an apocalyptic number.

20111350225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20111350225 is a deficient number, since it is larger than the sum of its proper divisors (4828755515).

20111350225 is a wasteful number, since it uses less digits than its factorization.

20111350225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65540 (or 65535 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 20111350225 its reverse (52205311102), we get a palindrome (72316661327).

The spelling of 20111350225 in words is "twenty billion, one hundred eleven million, three hundred fifty thousand, two hundred twenty-five".