20144630 has 32 divisors (see below), whose sum is σ = 39744000. Its totient is φ = 7290720.

The previous prime is 20144627. The next prime is 20144633. The reversal of 20144630 is 3644102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20144627) and next prime (20144633).

It is a super-2 number, since 2×20144630² = 811612235673800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40121 + ... + 40619.

It is an arithmetic number, because the mean of its divisors is an integer number (1242000).

Almost surely, 2^20144630 is an apocalyptic number.

20144630 is a deficient number, since it is larger than the sum of its proper divisors (19599370).

20144630 is a wasteful number, since it uses less digits than its factorization.

20144630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20144630 is about 4488.2769522390. The cubic root of 20144630 is about 272.0945011169.

Adding to 20144630 its reverse (3644102), we get a palindrome (23788732).

The spelling of 20144630 in words is "twenty million, one hundred forty-four thousand, six hundred thirty".