20065188 has 72 divisors (see below), whose sum is σ = 55472704. Its totient is φ = 5607360.

The previous prime is 20065183. The next prime is 20065189. The reversal of 20065188 is 88156002.

It is a super-2 number, since 2×20065188² = 805223538950688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20065181) 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 23 ways as a sum of consecutive naturals, for example, 18345 + ... + 19407.

Almost surely, 2^20065188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20065188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27736352).

20065188 is an abundant number, since it is smaller than the sum of its proper divisors (35407516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20065188 is a wasteful number, since it uses less digits than its factorization.

20065188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 20065188 is about 4479.4182658019. The cubic root of 20065188 is about 271.7363542519.

The spelling of 20065188 in words is "twenty million, sixty-five thousand, one hundred eighty-eight".