20165212 has 6 divisors (see below), whose sum is σ = 35289128. Its totient is φ = 10082604.

The previous prime is 20165203. The next prime is 20165231. The reversal of 20165212 is 21256102.

It is a self number, because there is not a number n which added to its sum of digits gives 20165212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2520648 + ... + 2520655.

Almost surely, 2^20165212 is an apocalyptic number.

It is an amenable number.

20165212 is a deficient number, since it is larger than the sum of its proper divisors (15123916).

20165212 is a wasteful number, since it uses less digits than its factorization.

20165212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041307 (or 5041305 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20165212 is about 4490.5692289508. The cubic root of 20165212 is about 272.1871369347.

The spelling of 20165212 in words is "twenty million, one hundred sixty-five thousand, two hundred twelve".