20727125 has 8 divisors (see below), whose sum is σ = 25867608. Its totient is φ = 16581600.

The previous prime is 20727103. The next prime is 20727137. The reversal of 20727125 is 52172702.

It can be written as a sum of positive squares in 4 ways, for example, as 61009 + 20666116 = 247^2 + 4546^2 .

It is not a de Polignac number, because 20727125 - 2⁶ = 20727061 is a prime.

It is a super-2 number, since 2×20727125² = 859227421531250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20727094 and 20727103.

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, 82784 + ... + 83033.

It is an arithmetic number, because the mean of its divisors is an integer number (3233451).

Almost surely, 2^20727125 is an apocalyptic number.

20727125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20727125 is a deficient number, since it is larger than the sum of its proper divisors (5140483).

20727125 is an equidigital number, since it uses as much as digits as its factorization.

20727125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165832 (or 165822 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 20727125 is about 4552.7052397448. The cubic root of 20727125 is about 274.6922176393.

Adding to 20727125 its reverse (52172702), we get a palindrome (72899827).

The spelling of 20727125 in words is "twenty million, seven hundred twenty-seven thousand, one hundred twenty-five".