1999100010 has 64 divisors (see below), whose sum is σ = 5186908800. Its totient is φ = 491380992.

The previous prime is 1999099979. The next prime is 1999100011. The reversal of 1999100010 is 100019991.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1999100011) 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, 26305 + ... + 68484.

It is an arithmetic number, because the mean of its divisors is an integer number (81045450).

Almost surely, 2^1999100010 is an apocalyptic number.

1999100010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1999100010 is an abundant number, since it is smaller than the sum of its proper divisors (3187808790).

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

1999100010 is a wasteful number, since it uses less digits than its factorization.

1999100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94855.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 1999100010 is about 44711.2962236614. The cubic root of 1999100010 is about 1259.7320354826.

The spelling of 1999100010 in words is "one billion, nine hundred ninety-nine million, one hundred thousand, ten".