20630274 has 48 divisors (see below), whose sum is σ = 49051008. Its totient is φ = 5765088.

The previous prime is 20630249. The next prime is 20630293. The reversal of 20630274 is 47203602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13072 + ... + 14564.

It is an arithmetic number, because the mean of its divisors is an integer number (1021896).

Almost surely, 2^20630274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20630274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24525504).

20630274 is an abundant number, since it is smaller than the sum of its proper divisors (28420734).

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

20630274 is a wasteful number, since it uses less digits than its factorization.

20630274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20630274 is about 4542.0561423214. The cubic root of 20630274 is about 274.2637008778.

Adding to 20630274 its reverse (47203602), we get a palindrome (67833876).

The spelling of 20630274 in words is "twenty million, six hundred thirty thousand, two hundred seventy-four".