1999933506 has 48 divisors (see below), whose sum is σ = 4495196160. Its totient is φ = 642133440.

The previous prime is 1999933489. The next prime is 1999933511. The reversal of 1999933506 is 6053399991.

It is a happy number.

1999933506 is a `hidden beast` number, since 19 + 9 + 99 + 33 + 506 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41151 + ... + 75453.

It is an arithmetic number, because the mean of its divisors is an integer number (93649920).

Almost surely, 2^1999933506 is an apocalyptic number.

1999933506 is an abundant number, since it is smaller than the sum of its proper divisors (2495262654).

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

1999933506 is a wasteful number, since it uses less digits than its factorization.

1999933506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34431 (or 34428 counting only the distinct ones).

The product of its (nonzero) digits is 1771470, while the sum is 54.

The square root of 1999933506 is about 44720.6161182960. The cubic root of 1999933506 is about 1259.9070868751.

The spelling of 1999933506 in words is "one billion, nine hundred ninety-nine million, nine hundred thirty-three thousand, five hundred six".