20150 has 24 divisors (see below), whose sum is σ = 41664. Its totient is φ = 7200.

The previous prime is 20149. The next prime is 20161. The reversal of 20150 is 5102.

20150 = T₂₇ + T₂₈ + ... + T₅₁.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 635 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (1736).

2²⁰¹⁵⁰ is an apocalyptic number.

20150 is an abundant number, since it is smaller than the sum of its proper divisors (21514).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20832).

20150 is a wasteful number, since it uses less digits than its factorization.

20150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 20150 is about 141.9506956658. The cubic root of 20150 is about 27.2118676586.

Adding to 20150 its reverse (5102), we get a palindrome (25252).

The spelling of 20150 in words is "twenty thousand, one hundred fifty".