20424030 has 64 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 4862720.

The previous prime is 20423989. The next prime is 20424043. The reversal of 20424030 is 3042402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18946 + ... + 19994.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^20424030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20424030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27216000).

20424030 is an abundant number, since it is smaller than the sum of its proper divisors (34007970).

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

20424030 is a wasteful number, since it uses less digits than its factorization.

20424030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20424030 is about 4519.2952990483. The cubic root of 20424030 is about 273.3466861743.

Adding to 20424030 its reverse (3042402), we get a palindrome (23466432).

The spelling of 20424030 in words is "twenty million, four hundred twenty-four thousand, thirty".