1813206906 has 48 divisors (see below), whose sum is σ = 4522190400. Its totient is φ = 514327104.

The previous prime is 1813206887. The next prime is 1813206907. The reversal of 1813206906 is 6096023181.

It is not an unprimeable number, because it can be changed into a prime (1813206907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34251 + ... + 69278.

It is an arithmetic number, because the mean of its divisors is an integer number (94212300).

Almost surely, 2^1813206906 is an apocalyptic number.

1813206906 is an abundant number, since it is smaller than the sum of its proper divisors (2708983494).

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

1813206906 is a wasteful number, since it uses less digits than its factorization.

1813206906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103683 (or 103680 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1813206906 is about 42581.7672954047. The cubic root of 1813206906 is about 1219.4082290830.

The spelling of 1813206906 in words is "one billion, eight hundred thirteen million, two hundred six thousand, nine hundred six".