2180429109 has 12 divisors (see below), whose sum is σ = 3158435436. Its totient is φ = 1449499392.

The previous prime is 2180429101. The next prime is 2180429131. The reversal of 2180429109 is 9019240812.

2180429109 is a `hidden beast` number, since 218 + 0 + 429 + 10 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 882268209 + 1298160900 = 29703^2 + 36030^2 .

It is not a de Polignac number, because 2180429109 - 2³ = 2180429101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180429101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339982 + ... + 346335.

It is an arithmetic number, because the mean of its divisors is an integer number (263202953).

Almost surely, 2^2180429109 is an apocalyptic number.

It is an amenable number.

2180429109 is a deficient number, since it is larger than the sum of its proper divisors (978006327).

2180429109 is a wasteful number, since it uses less digits than its factorization.

2180429109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686676 (or 686673 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 2180429109 is about 46695.0651461158. The cubic root of 2180429109 is about 1296.7233277147.

The spelling of 2180429109 in words is "two billion, one hundred eighty million, four hundred twenty-nine thousand, one hundred nine".