20143630 has 32 divisors (see below), whose sum is σ = 40751424. Its totient is φ = 7113216.

The previous prime is 20143621. The next prime is 20143631. The reversal of 20143630 is 3634102.

It is a junction number, because it is equal to n+sod(n) for n = 20143598 and 20143607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143631) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 379 + ... + 6358.

It is an arithmetic number, because the mean of its divisors is an integer number (1273482).

Almost surely, 2^20143630 is an apocalyptic number.

20143630 is an abundant number, since it is smaller than the sum of its proper divisors (20607794).

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

20143630 is a wasteful number, since it uses less digits than its factorization.

20143630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20143630 is about 4488.1655495313. The cubic root of 20143630 is about 272.0899986928.

Adding to 20143630 its reverse (3634102), we get a palindrome (23777732).

The spelling of 20143630 in words is "twenty million, one hundred forty-three thousand, six hundred thirty".