1993345906 has 16 divisors (see below), whose sum is σ = 3017253888. Its totient is φ = 987635200.

The previous prime is 1993345903. The next prime is 1993345951. The reversal of 1993345906 is 6095433991.

It is a self number, because there is not a number n which added to its sum of digits gives 1993345906.

It is not an unprimeable number, because it can be changed into a prime (1993345903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90546 + ... + 110386.

It is an arithmetic number, because the mean of its divisors is an integer number (188578368).

Almost surely, 2^1993345906 is an apocalyptic number.

1993345906 is a deficient number, since it is larger than the sum of its proper divisors (1023907982).

1993345906 is a wasteful number, since it uses less digits than its factorization.

1993345906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20297.

The product of its (nonzero) digits is 787320, while the sum is 49.

The square root of 1993345906 is about 44646.9025353383. The cubic root of 1993345906 is about 1258.5222252445.

The spelling of 1993345906 in words is "one billion, nine hundred ninety-three million, three hundred forty-five thousand, nine hundred six".