20600725 has 6 divisors (see below), whose sum is σ = 25544930. Its totient is φ = 16480560.

The previous prime is 20600689. The next prime is 20600743. The reversal of 20600725 is 52700602.

It can be written as a sum of positive squares in 3 ways, for example, as 3411409 + 17189316 = 1847^2 + 4146^2 .

It is not a de Polignac number, because 20600725 - 2⁷ = 20600597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20600696 and 20600705.

It is a congruent number.

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, 411990 + ... + 412039.

Almost surely, 2^20600725 is an apocalyptic number.

20600725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20600725 is a deficient number, since it is larger than the sum of its proper divisors (4944205).

20600725 is an equidigital number, since it uses as much as digits as its factorization.

20600725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824039 (or 824034 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20600725 is about 4538.8021547540. The cubic root of 20600725 is about 274.1326945319.

The spelling of 20600725 in words is "twenty million, six hundred thousand, seven hundred twenty-five".