21733510640225 has 6 divisors (see below), whose sum is σ = 26949553193910. Its totient is φ = 17386808512160.

The previous prime is 21733510640213. The next prime is 21733510640243. The reversal of 21733510640225 is 52204601533712.

It can be written as a sum of positive squares in 3 ways, for example, as 4210010452561 + 17523500187664 = 2051831^2 + 4186108^2 .

It is not a de Polignac number, because 21733510640225 - 2¹⁴ = 21733510623841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 434670212780 + ... + 434670212829.

It is an arithmetic number, because the mean of its divisors is an integer number (4491592198985).

Almost surely, 2^{21733510640225} is an apocalyptic number.

21733510640225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21733510640225 is a deficient number, since it is larger than the sum of its proper divisors (5216042553685).

21733510640225 is an equidigital number, since it uses as much as digits as its factorization.

21733510640225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869340425619 (or 869340425614 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 21733510640225 in words is "twenty-one trillion, seven hundred thirty-three billion, five hundred ten million, six hundred forty thousand, two hundred twenty-five".