1918712004 has 72 divisors (see below), whose sum is σ = 5210531424. Its totient is φ = 547219200.

The previous prime is 1918711969. The next prime is 1918712027. The reversal of 1918712004 is 4002178191.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14182 + ... + 63549.

It is an arithmetic number, because the mean of its divisors is an integer number (72368492).

Almost surely, 2^1918712004 is an apocalyptic number.

It is an amenable number.

1918712004 is an abundant number, since it is smaller than the sum of its proper divisors (3291819420).

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

1918712004 is a wasteful number, since it uses less digits than its factorization.

1918712004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77777 (or 77764 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 1918712004 is about 43803.1049584387. The cubic root of 1918712004 is about 1242.6150163896.

The spelling of 1918712004 in words is "one billion, nine hundred eighteen million, seven hundred twelve thousand, four".