20577125 has 8 divisors (see below), whose sum is σ = 25680408. Its totient is φ = 16461600.

The previous prime is 20577119. The next prime is 20577131. The reversal of 20577125 is 52177502.

It is an interprime number because it is at equal distance from previous prime (20577119) and next prime (20577131).

It can be written as a sum of positive squares in 4 ways, for example, as 452929 + 20124196 = 673^2 + 4486^2 .

It is not a de Polignac number, because 20577125 - 2¹⁸ = 20314981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82184 + ... + 82433.

It is an arithmetic number, because the mean of its divisors is an integer number (3210051).

Almost surely, 2^20577125 is an apocalyptic number.

20577125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20577125 is a deficient number, since it is larger than the sum of its proper divisors (5103283).

20577125 is an equidigital number, since it uses as much as digits as its factorization.

20577125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164632 (or 164622 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 20577125 is about 4536.2016048672. The cubic root of 20577125 is about 274.0279732394.

It can be divided in two parts, 20577 and 125, that added together give a palindrome (20702).

The spelling of 20577125 in words is "twenty million, five hundred seventy-seven thousand, one hundred twenty-five".