20364630 has 128 divisors (see below), whose sum is σ = 59222016. Its totient is φ = 4416000.

The previous prime is 20364571. The next prime is 20364649. The reversal of 20364630 is 3646302.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20364630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 201580 + ... + 201680.

It is an arithmetic number, because the mean of its divisors is an integer number (462672).

Almost surely, 2^20364630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20364630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29611008).

20364630 is an abundant number, since it is smaller than the sum of its proper divisors (38857386).

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

20364630 is a wasteful number, since it uses less digits than its factorization.

20364630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 20364630 is about 4512.7186927616. The cubic root of 20364630 is about 273.0814339307.

It can be divided in two parts, 2036 and 4630, that added together give a palindrome (6666).

The spelling of 20364630 in words is "twenty million, three hundred sixty-four thousand, six hundred thirty".