20438130 has 16 divisors (see below), whose sum is σ = 49051584. Its totient is φ = 5450160.

The previous prime is 20438123. The next prime is 20438147. The reversal of 20438130 is 3183402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20438097 and 20438106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340606 + ... + 340665.

It is an arithmetic number, because the mean of its divisors is an integer number (3065724).

Almost surely, 2^20438130 is an apocalyptic number.

20438130 is an abundant number, since it is smaller than the sum of its proper divisors (28613454).

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

20438130 is a wasteful number, since it uses less digits than its factorization.

20438130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681281.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20438130 is about 4520.8550076285. The cubic root of 20438130 is about 273.4095745413.

The spelling of 20438130 in words is "twenty million, four hundred thirty-eight thousand, one hundred thirty".