130021830 has 24 divisors (see below), whose sum is σ = 338056992. Its totient is φ = 34672464.

The previous prime is 130021817. The next prime is 130021847. The reversal of 130021830 is 38120031.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 722254 + ... + 722433.

It is an arithmetic number, because the mean of its divisors is an integer number (14085708).

Almost surely, 2^130021830 is an apocalyptic number.

130021830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

130021830 is an abundant number, since it is smaller than the sum of its proper divisors (208035162).

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

130021830 is a wasteful number, since it uses less digits than its factorization.

130021830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444700 (or 1444697 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 130021830 is about 11402.7115196343. The cubic root of 130021830 is about 506.6080557971.

Adding to 130021830 its reverse (38120031), we get a palindrome (168141861).

The spelling of 130021830 in words is "one hundred thirty million, twenty-one thousand, eight hundred thirty".