109555020 has 72 divisors (see below), whose sum is σ = 336366576. Its totient is φ = 28858752.

The previous prime is 109555009. The next prime is 109555027. The reversal of 109555020 is 20555901.

109555020 = 833² + 834² + ... + 967².

109555020 is a `hidden beast` number, since 1 + 0 + 95 + 550 + 20 = 666.

It is not an unprimeable number, because it can be changed into a prime (109555027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11274 + ... + 18606.

It is an arithmetic number, because the mean of its divisors is an integer number (4671758).

Almost surely, 2^109555020 is an apocalyptic number.

109555020 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 109555020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168183288).

109555020 is an abundant number, since it is smaller than the sum of its proper divisors (226811556).

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

109555020 is a wasteful number, since it uses less digits than its factorization.

109555020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7431 (or 7426 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 109555020 is about 10466.8533953620. The cubic root of 109555020 is about 478.4950258751.

The spelling of 109555020 in words is "one hundred nine million, five hundred fifty-five thousand, twenty".