20065172 has 12 divisors (see below), whose sum is σ = 35147616. Its totient is φ = 10023000.

The previous prime is 20065163. The next prime is 20065181. The reversal of 20065172 is 27156002.

It is an interprime number because it is at equal distance from previous prime (20065163) and next prime (20065181).

It is a super-2 number, since 2×20065172² = 805222254779168, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 4547 + ... + 7797.

It is an arithmetic number, because the mean of its divisors is an integer number (2928968).

Almost surely, 2^20065172 is an apocalyptic number.

It is an amenable number.

20065172 is a deficient number, since it is larger than the sum of its proper divisors (15082444).

20065172 is a wasteful number, since it uses less digits than its factorization.

20065172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4798 (or 4796 counting only the distinct ones).

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

The square root of 20065172 is about 4479.4164798554. The cubic root of 20065172 is about 271.7362820243.

The spelling of 20065172 in words is "twenty million, sixty-five thousand, one hundred seventy-two".