1994195500 has 48 divisors (see below), whose sum is σ = 4751274528. Its totient is φ = 725160000.

The previous prime is 1994195491. The next prime is 1994195501. The reversal of 1994195500 is 55914991.

It is not an unprimeable number, because it can be changed into a prime (1994195501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175791 + ... + 186790.

It is an arithmetic number, because the mean of its divisors is an integer number (98984886).

Almost surely, 2^1994195500 is an apocalyptic number.

1994195500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1994195500 is an abundant number, since it is smaller than the sum of its proper divisors (2757079028).

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

1994195500 is a wasteful number, since it uses less digits than its factorization.

1994195500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362611 (or 362599 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 1994195500 is about 44656.4161123572. The cubic root of 1994195500 is about 1258.7010002138.

The spelling of 1994195500 in words is "one billion, nine hundred ninety-four million, one hundred ninety-five thousand, five hundred".