1999012026 has 16 divisors (see below), whose sum is σ = 4361480928. Its totient is φ = 605761200.

The previous prime is 1999012007. The next prime is 1999012051. The reversal of 1999012026 is 6202109991.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15143965 + ... + 15144096.

It is an arithmetic number, because the mean of its divisors is an integer number (272592558).

Almost surely, 2^1999012026 is an apocalyptic number.

1999012026 is an abundant number, since it is smaller than the sum of its proper divisors (2362468902).

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

1999012026 is a wasteful number, since it uses less digits than its factorization.

1999012026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30288077.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 1999012026 is about 44710.3123004078. The cubic root of 1999012026 is about 1259.7135541845.

The spelling of 1999012026 in words is "one billion, nine hundred ninety-nine million, twelve thousand, twenty-six".