109129020 has 384 divisors, whose sum is σ = 433520640. Its totient is φ = 19768320.

The previous prime is 109129019. The next prime is 109129037. The reversal of 109129020 is 20921901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1381341 + ... + 1381419.

It is an arithmetic number, because the mean of its divisors is an integer number (1128960).

Almost surely, 2^109129020 is an apocalyptic number.

109129020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109129020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216760320).

109129020 is an abundant number, since it is smaller than the sum of its proper divisors (324391620).

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

109129020 is a wasteful number, since it uses less digits than its factorization.

109129020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 143 counting only the distinct ones).

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

The square root of 109129020 is about 10446.4836189026. The cubic root of 109129020 is about 477.8740177901.

The spelling of 109129020 in words is "one hundred nine million, one hundred twenty-nine thousand, twenty".