20670150 has 48 divisors (see below), whose sum is σ = 52527888. Its totient is φ = 5376000.

The previous prime is 20670137. The next prime is 20670151. The reversal of 20670150 is 5107602.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4470 + ... + 7830.

It is an arithmetic number, because the mean of its divisors is an integer number (1094331).

Almost surely, 2^20670150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20670150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26263944).

20670150 is an abundant number, since it is smaller than the sum of its proper divisors (31857738).

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

20670150 is a wasteful number, since it uses less digits than its factorization.

20670150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417 (or 3412 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20670150 is about 4546.4436651079. The cubic root of 20670150 is about 274.4402941136.

Adding to 20670150 its reverse (5107602), we get a palindrome (25777752).

The spelling of 20670150 in words is "twenty million, six hundred seventy thousand, one hundred fifty".