20351130 has 16 divisors (see below), whose sum is σ = 48842784. Its totient is φ = 5426960.

The previous prime is 20351119. The next prime is 20351131. The reversal of 20351130 is 3115302.

It is a happy number.

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

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (20351131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339156 + ... + 339215.

It is an arithmetic number, because the mean of its divisors is an integer number (3052674).

Almost surely, 2^20351130 is an apocalyptic number.

20351130 is an abundant number, since it is smaller than the sum of its proper divisors (28491654).

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

20351130 is a wasteful number, since it uses less digits than its factorization.

20351130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678381.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 20351130 is about 4511.2226724027. Note that the first 3 decimals coincide. The cubic root of 20351130 is about 273.0210774157.

Adding to 20351130 its reverse (3115302), we get a palindrome (23466432).

The spelling of 20351130 in words is "twenty million, three hundred fifty-one thousand, one hundred thirty".