1918809308826 has 32 divisors (see below), whose sum is σ = 4268297657280. Its totient is φ = 638961557328.

The previous prime is 1918809308807. The next prime is 1918809308831. The reversal of 1918809308826 is 6288039088191.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17766376 + ... + 17874051.

It is an arithmetic number, because the mean of its divisors is an integer number (133384301790).

Almost surely, 2^{1918809308826} is an apocalyptic number.

1918809308826 is an abundant number, since it is smaller than the sum of its proper divisors (2349488348454).

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

1918809308826 is a wasteful number, since it uses less digits than its factorization.

1918809308826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35641435 (or 35641429 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 63.

The spelling of 1918809308826 in words is "one trillion, nine hundred eighteen billion, eight hundred nine million, three hundred eight thousand, eight hundred twenty-six".