20213130 has 64 divisors (see below), whose sum is σ = 56049408. Its totient is φ = 4569600.

The previous prime is 20213107. The next prime is 20213183. The reversal of 20213130 is 3131202.

It is a happy 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, 20734 + ... + 21686.

It is an arithmetic number, because the mean of its divisors is an integer number (875772).

Almost surely, 2^20213130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20213130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28024704).

20213130 is an abundant number, since it is smaller than the sum of its proper divisors (35836278).

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

20213130 is a wasteful number, since it uses less digits than its factorization.

20213130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20213130 is about 4495.9014668918. The cubic root of 20213130 is about 272.4025631496.

Adding to 20213130 its reverse (3131202), we get a palindrome (23344332).

It can be divided in two parts, 2021 and 3130, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 20213130 in words is "twenty million, two hundred thirteen thousand, one hundred thirty".