20706125 has 36 divisors (see below), whose sum is σ = 29192436. Its totient is φ = 14652000.

The previous prime is 20706121. The next prime is 20706131. The reversal of 20706125 is 52160702.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 465124 + 20241001 = 682^2 + 4499^2 .

It is not a de Polignac number, because 20706125 - 2² = 20706121 is a prime.

It is a super-2 number, since 2×20706125² = 857487225031250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20706125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20706121) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 559607 + ... + 559643.

It is an arithmetic number, because the mean of its divisors is an integer number (810901).

Almost surely, 2^20706125 is an apocalyptic number.

20706125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20706125 is a deficient number, since it is larger than the sum of its proper divisors (8486311).

20706125 is an equidigital number, since it uses as much as digits as its factorization.

20706125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20706125 is about 4550.3983342121. The cubic root of 20706125 is about 274.5994167672.

Adding to 20706125 its reverse (52160702), we get a palindrome (72866827).

The spelling of 20706125 in words is "twenty million, seven hundred six thousand, one hundred twenty-five".