20018241930625 has 45 divisors (see below), whose sum is σ = 25173314156991. Its totient is φ = 15913745640000.

The previous prime is 20018241930611. The next prime is 20018241930637. The reversal of 20018241930625 is 52603914281002.

The square root of 20018241930625 is 4474175.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 19963586971969 + 54654958656 = 4468063^2 + 233784^2 .

It is not a de Polignac number, because 20018241930625 - 2¹¹ = 20018241928577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 21364185157 + ... + 21364186093.

Almost surely, 2^{20018241930625} is an apocalyptic number.

20018241930625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20018241930625 is the 4474175-th square number.

20018241930625 is the 2237088-th centered octagonal number.

It is an amenable number.

20018241930625 is a deficient number, since it is larger than the sum of its proper divisors (5155072226366).

20018241930625 is an frugal number, since it uses more digits than its factorization.

20018241930625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 20018241930625 in words is "twenty trillion, eighteen billion, two hundred forty-one million, nine hundred thirty thousand, six hundred twenty-five".