20634150 has 48 divisors (see below), whose sum is σ = 51568128. Its totient is φ = 5460000.

The previous prime is 20634143. The next prime is 20634161. The reversal of 20634150 is 5143602.

It is a happy number.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 22195 + ... + 23105.

It is an arithmetic number, because the mean of its divisors is an integer number (1074336).

Almost surely, 2^20634150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20634150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25784064).

20634150 is an abundant number, since it is smaller than the sum of its proper divisors (30933978).

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

20634150 is a wasteful number, since it uses less digits than its factorization.

20634150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20634150 is about 4542.4828012883. The cubic root of 20634150 is about 274.2808759532.

Adding to 20634150 its reverse (5143602), we get a palindrome (25777752).

The spelling of 20634150 in words is "twenty million, six hundred thirty-four thousand, one hundred fifty".