20533613225 has 12 divisors (see below), whose sum is σ = 25558501056. Its totient is φ = 16364425680.

The previous prime is 20533613207. The next prime is 20533613279. The reversal of 20533613225 is 52231633502.

It is not a de Polignac number, because 20533613225 - 2¹⁴ = 20533596841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20533613191 and 20533613200.

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 11 ways as a sum of consecutive naturals, for example, 1554917 + ... + 1568066.

It is an arithmetic number, because the mean of its divisors is an integer number (2129875088).

Almost surely, 2^20533613225 is an apocalyptic number.

20533613225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20533613225 is a deficient number, since it is larger than the sum of its proper divisors (5024887831).

20533613225 is a wasteful number, since it uses less digits than its factorization.

20533613225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123256 (or 3123251 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 32.

The spelling of 20533613225 in words is "twenty billion, five hundred thirty-three million, six hundred thirteen thousand, two hundred twenty-five".