20408130 has 48 divisors (see below), whose sum is σ = 55373760. Its totient is φ = 5205024.

The previous prime is 20408117. The next prime is 20408189. The reversal of 20408130 is 3180402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2860 + ... + 6999.

It is an arithmetic number, because the mean of its divisors is an integer number (1153620).

Almost surely, 2^20408130 is an apocalyptic number.

20408130 is an abundant number, since it is smaller than the sum of its proper divisors (34965630).

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

20408130 is a wasteful number, since it uses less digits than its factorization.

20408130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9895 (or 9892 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20408130 is about 4517.5358327301. The cubic root of 20408130 is about 273.2757347732.

Adding to 20408130 its reverse (3180402), we get a palindrome (23588532).

The spelling of 20408130 in words is "twenty million, four hundred eight thousand, one hundred thirty".