20430210 has 64 divisors (see below), whose sum is σ = 52980480. Its totient is φ = 5026560.

The previous prime is 20430191. The next prime is 20430251. The reversal of 20430210 is 1203402.

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, 19500 + ... + 20520.

It is an arithmetic number, because the mean of its divisors is an integer number (827820).

Almost surely, 2^20430210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26490240).

20430210 is an abundant number, since it is smaller than the sum of its proper divisors (32550270).

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

20430210 is a wasteful number, since it uses less digits than its factorization.

20430210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083.

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

The square root of 20430210 is about 4519.9789822520. The cubic root of 20430210 is about 273.3742535735.

Adding to 20430210 its reverse (1203402), we get a palindrome (21633612).

The spelling of 20430210 in words is "twenty million, four hundred thirty thousand, two hundred ten".