20120430 has 64 divisors (see below), whose sum is σ = 55468800. Its totient is φ = 4619520.

The previous prime is 20120407. The next prime is 20120437. The reversal of 20120430 is 3402102.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4666 + ... + 7874.

It is an arithmetic number, because the mean of its divisors is an integer number (866700).

Almost surely, 2^20120430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20120430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27734400).

20120430 is an abundant number, since it is smaller than the sum of its proper divisors (35348370).

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

20120430 is a wasteful number, since it uses less digits than its factorization.

20120430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20120430 is about 4485.5802300260. The cubic root of 20120430 is about 271.9855005968.

Adding to 20120430 its reverse (3402102), we get a palindrome (23522532).

The spelling of 20120430 in words is "twenty million, one hundred twenty thousand, four hundred thirty".