20627725 has 6 divisors (see below), whose sum is σ = 25578410. Its totient is φ = 16502160.

The previous prime is 20627713. The next prime is 20627731. The reversal of 20627725 is 52772602.

It can be written as a sum of positive squares in 3 ways, for example, as 5774409 + 14853316 = 2403^2 + 3854^2 .

It is not a de Polignac number, because 20627725 - 2⁵ = 20627693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 412530 + ... + 412579.

Almost surely, 2^20627725 is an apocalyptic number.

20627725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20627725 is a deficient number, since it is larger than the sum of its proper divisors (4950685).

20627725 is an equidigital number, since it uses as much as digits as its factorization.

20627725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825119 (or 825114 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20627725 is about 4541.7755338634. The cubic root of 20627725 is about 274.2524047446.

The spelling of 20627725 in words is "twenty million, six hundred twenty-seven thousand, seven hundred twenty-five".