1930818109 has 16 divisors (see below), whose sum is σ = 2120264640. Its totient is φ = 1743730560.

The previous prime is 1930818107. The next prime is 1930818137. The reversal of 1930818109 is 9018180391.

It is a happy number.

It is not a de Polignac number, because 1930818109 - 2¹ = 1930818107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1930818107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2201179 + ... + 2202055.

It is an arithmetic number, because the mean of its divisors is an integer number (132516540).

Almost surely, 2^1930818109 is an apocalyptic number.

It is an amenable number.

1930818109 is a deficient number, since it is larger than the sum of its proper divisors (189446531).

1930818109 is a wasteful number, since it uses less digits than its factorization.

1930818109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980.

The product of its (nonzero) digits is 15552, while the sum is 40.

The square root of 1930818109 is about 43941.0754192475. The cubic root of 1930818109 is about 1245.2229637826. Note that the first 3 decimals are identical.

The spelling of 1930818109 in words is "one billion, nine hundred thirty million, eight hundred eighteen thousand, one hundred nine".