20540570540225 has 24 divisors (see below), whose sum is σ = 25503509361408. Its totient is φ = 16411045305600.

The previous prime is 20540570540207. The next prime is 20540570540263. The reversal of 20540570540225 is 52204507504502.

It is a happy number.

It is not a de Polignac number, because 20540570540225 - 2¹⁰ = 20540570539201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88571372 + ... + 88802978.

It is an arithmetic number, because the mean of its divisors is an integer number (1062646223392).

Almost surely, 2^{20540570540225} is an apocalyptic number.

20540570540225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20540570540225 is a deficient number, since it is larger than the sum of its proper divisors (4962938821183).

20540570540225 is a wasteful number, since it uses less digits than its factorization.

20540570540225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236225 (or 236220 counting only the distinct ones).

The product of its (nonzero) digits is 560000, while the sum is 41.

The spelling of 20540570540225 in words is "twenty trillion, five hundred forty billion, five hundred seventy million, five hundred forty thousand, two hundred twenty-five".