20124630 has 48 divisors (see below), whose sum is σ = 53323920. Its totient is φ = 5264064.

The previous prime is 20124623. The next prime is 20124631. The reversal of 20124630 is 3642102.

It is a happy number.

20124630 is a `hidden beast` number, since 20 + 12 + 4 + 630 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124631) 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 23 ways as a sum of consecutive naturals, for example, 2661 + ... + 6879.

It is an arithmetic number, because the mean of its divisors is an integer number (1110915).

Almost surely, 2^20124630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20124630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26661960).

20124630 is an abundant number, since it is smaller than the sum of its proper divisors (33199290).

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

20124630 is a wasteful number, since it uses less digits than its factorization.

20124630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285 (or 4282 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20124630 is about 4486.0483724543. The cubic root of 20124630 is about 272.0044243081.

Adding to 20124630 its reverse (3642102), we get a palindrome (23766732).

The spelling of 20124630 in words is "twenty million, one hundred twenty-four thousand, six hundred thirty".