20415150 has 72 divisors (see below), whose sum is σ = 62693904. Its totient is φ = 4665600.

The previous prime is 20415149. The next prime is 20415163. The reversal of 20415150 is 5151402.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 35 ways as a sum of consecutive naturals, for example, 91 + ... + 6390.

Almost surely, 2^20415150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20415150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31346952).

20415150 is an abundant number, since it is smaller than the sum of its proper divisors (42278754).

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

20415150 is a wasteful number, since it uses less digits than its factorization.

20415150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6506 (or 6498 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 20415150 is about 4518.3127381800. The cubic root of 20415150 is about 273.3070650280.

Adding to 20415150 its reverse (5151402), we get a palindrome (25566552).

The spelling of 20415150 in words is "twenty million, four hundred fifteen thousand, one hundred fifty".