20066725 has 18 divisors (see below), whose sum is σ = 28946994. Its totient is φ = 13759200.

The previous prime is 20066723. The next prime is 20066729. The reversal of 20066725 is 52766002.

It can be written as a sum of positive squares in 3 ways, for example, as 370881 + 19695844 = 609^2 + 4438^2 .

It is not a de Polignac number, because 20066725 - 2¹ = 20066723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20066693 and 20066702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066723) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 6966 + ... + 9415.

Almost surely, 2^20066725 is an apocalyptic number.

20066725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20066725 is a deficient number, since it is larger than the sum of its proper divisors (8880269).

20066725 is a wasteful number, since it uses less digits than its factorization.

20066725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16405 (or 16393 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20066725 is about 4479.5898249728. The cubic root of 20066725 is about 271.7432924394.

The spelling of 20066725 in words is "twenty million, sixty-six thousand, seven hundred twenty-five".