20433056225 has 12 divisors (see below), whose sum is σ = 25954966380. Its totient is φ = 15947750400.

The previous prime is 20433056213. The next prime is 20433056297. The reversal of 20433056225 is 52265033402.

It can be written as a sum of positive squares in 6 ways, for example, as 2467406929 + 17965649296 = 49673^2 + 134036^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20433056225 is a prime.

It is a super-2 number, since 2×20433056225² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20433056191 and 20433056200.

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, 9966320 + ... + 9968369.

It is an arithmetic number, because the mean of its divisors is an integer number (2162913865).

Almost surely, 2^20433056225 is an apocalyptic number.

20433056225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20433056225 is a deficient number, since it is larger than the sum of its proper divisors (5521910155).

20433056225 is a wasteful number, since it uses less digits than its factorization.

20433056225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19934740 (or 19934735 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 20433056225 its reverse (52265033402), we get a palindrome (72698089627).

The spelling of 20433056225 in words is "twenty billion, four hundred thirty-three million, fifty-six thousand, two hundred twenty-five".