1999999995 has 64 divisors (see below), whose sum is σ = 3753354240. Its totient is φ = 890523648.

The previous prime is 1999999973. The next prime is 2000000011. The reversal of 1999999995 is 5999999991.

It is not a de Polignac number, because 1999999995 - 2¹⁴ = 1999983611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1999999995.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 698607 + ... + 701463.

It is an arithmetic number, because the mean of its divisors is an integer number (58646160).

Almost surely, 2^1999999995 is an apocalyptic number.

1999999995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1999999995 is a deficient number, since it is larger than the sum of its proper divisors (1753354245).

1999999995 is a wasteful number, since it uses less digits than its factorization.

1999999995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044.

The product of its digits is 215233605, while the sum is 78.

The square root of 1999999995 is about 44721.3594940941. The cubic root of 1999999995 is about 1259.9210488449.

The spelling of 1999999995 in words is "one billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-five".