1913817812 has 12 divisors (see below), whose sum is σ = 3349620960. Its totient is φ = 956783256.

The previous prime is 1913817811. The next prime is 1913817817. The reversal of 1913817812 is 2187183191.

It is a self number, because there is not a number n which added to its sum of digits gives 1913817812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913817811) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8489 + ... + 62447.

It is an arithmetic number, because the mean of its divisors is an integer number (279135080).

Almost surely, 2^1913817812 is an apocalyptic number.

It is an amenable number.

1913817812 is a deficient number, since it is larger than the sum of its proper divisors (1435803148).

1913817812 is a wasteful number, since it uses less digits than its factorization.

1913817812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62830 (or 62828 counting only the distinct ones).

The product of its digits is 24192, while the sum is 41.

The square root of 1913817812 is about 43747.2034763366. The cubic root of 1913817812 is about 1241.5575753012.

The spelling of 1913817812 in words is "one billion, nine hundred thirteen million, eight hundred seventeen thousand, eight hundred twelve".