129910020 has 48 divisors (see below), whose sum is σ = 364307328. Its totient is φ = 34589440.

The previous prime is 129910013. The next prime is 129910043. The reversal of 129910020 is 20019921.

It is a super-2 number, since 2×129910020² = 33753226592800800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 52000 + ... + 54440.

It is an arithmetic number, because the mean of its divisors is an integer number (7589736).

Almost surely, 2^129910020 is an apocalyptic number.

129910020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129910020 is an abundant number, since it is smaller than the sum of its proper divisors (234397308).

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

129910020 is a wasteful number, since it uses less digits than its factorization.

129910020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340 (or 3338 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 129910020 is about 11397.8076839364. The cubic root of 129910020 is about 506.4627979044.

Adding to 129910020 its reverse (20019921), we get a palindrome (149929941).

The spelling of 129910020 in words is "one hundred twenty-nine million, nine hundred ten thousand, twenty".