1994109915 has 32 divisors (see below), whose sum is σ = 3661549056. Its totient is φ = 907799040.

The previous prime is 1994109823. The next prime is 1994109917. The reversal of 1994109915 is 5199014991.

It is a happy number.

It is not a de Polignac number, because 1994109915 - 2¹¹ = 1994107867 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1994109917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14097 + ... + 64706.

It is an arithmetic number, because the mean of its divisors is an integer number (114423408).

Almost surely, 2^1994109915 is an apocalyptic number.

1994109915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1994109915 is a deficient number, since it is larger than the sum of its proper divisors (1667439141).

1994109915 is a wasteful number, since it uses less digits than its factorization.

1994109915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79059.

The product of its (nonzero) digits is 131220, while the sum is 48.

The square root of 1994109915 is about 44655.4578411195. The cubic root of 1994109915 is about 1258.6829933757.

It can be divided in two parts, 199 and 4109915, that added together give a palindrome (4110114).

The spelling of 1994109915 in words is "one billion, nine hundred ninety-four million, one hundred nine thousand, nine hundred fifteen".