20165460 has 144 divisors (see below), whose sum is σ = 69330240. Its totient is φ = 4366656.

The previous prime is 20165449. The next prime is 20165471. The reversal of 20165460 is 6456102.

It is an interprime number because it is at equal distance from previous prime (20165449) and next prime (20165471).

It is a self number, because there is not a number n which added to its sum of digits gives 20165460.

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 in 47 ways as a sum of consecutive naturals, for example, 1061331 + ... + 1061349.

It is an arithmetic number, because the mean of its divisors is an integer number (481460).

Almost surely, 2^20165460 is an apocalyptic number.

20165460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20165460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34665120).

20165460 is an abundant number, since it is smaller than the sum of its proper divisors (49164780).

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

20165460 is a wasteful number, since it uses less digits than its factorization.

20165460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20165460 is about 4490.5968422917. The cubic root of 20165460 is about 272.1882527530.

The spelling of 20165460 in words is "twenty million, one hundred sixty-five thousand, four hundred sixty".