1945212018 has 16 divisors (see below), whose sum is σ = 3890955936. Its totient is φ = 648315360.

The previous prime is 1945211977. The next prime is 1945212037. The reversal of 1945212018 is 8102125491.

It is a self number, because there is not a number n which added to its sum of digits gives 1945212018.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 37905 + ... + 72987.

It is an arithmetic number, because the mean of its divisors is an integer number (243184746).

Almost surely, 2^1945212018 is an apocalyptic number.

1945212018 is an abundant number, since it is smaller than the sum of its proper divisors (1945743918).

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

1945212018 is a wasteful number, since it uses less digits than its factorization.

1945212018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44329.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1945212018 is about 44104.5577916841. The cubic root of 1945212018 is about 1248.3096122752.

The spelling of 1945212018 in words is "one billion, nine hundred forty-five million, two hundred twelve thousand, eighteen".