20853607230625 has 45 divisors (see below), whose sum is σ = 28219382140719. Its totient is φ = 15398490900000.

The previous prime is 20853607230583. The next prime is 20853607230647. The reversal of 20853607230625 is 52603270635802.

The square root of 20853607230625 is 4566575.

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 20597737171729 + 255870058896 = 4538473^2 + 505836^2 .

It is not a de Polignac number, because 20853607230625 - 2¹³ = 20853607222433 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, 1484129850 + ... + 1484143900.

Almost surely, 2^{20853607230625} is an apocalyptic number.

20853607230625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20853607230625 is the 4566575-th square number.

20853607230625 is the 2283288-th centered octagonal number.

It is an amenable number.

20853607230625 is a deficient number, since it is larger than the sum of its proper divisors (7365774910094).

20853607230625 is an frugal number, since it uses more digits than its factorization.

20853607230625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28148 (or 14069 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 20853607230625 in words is "twenty trillion, eight hundred fifty-three billion, six hundred seven million, two hundred thirty thousand, six hundred twenty-five".