1918421076 has 144 divisors (see below), whose sum is σ = 5519162880. Its totient is φ = 513152640.

The previous prime is 1918421039. The next prime is 1918421101. The reversal of 1918421076 is 6701248191.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 511215 + ... + 514953.

It is an arithmetic number, because the mean of its divisors is an integer number (38327520).

Almost surely, 2^1918421076 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1918421076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2759581440).

1918421076 is an abundant number, since it is smaller than the sum of its proper divisors (3600741804).

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

1918421076 is a wasteful number, since it uses less digits than its factorization.

1918421076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806 (or 3791 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 1918421076 is about 43799.7839720700. The cubic root of 1918421076 is about 1242.5522086703.

The spelling of 1918421076 in words is "one billion, nine hundred eighteen million, four hundred twenty-one thousand, seventy-six".