1905142218 has 32 divisors (see below), whose sum is σ = 4356426240. Its totient is φ = 544099440.

The previous prime is 1905142199. The next prime is 1905142223. The reversal of 1905142218 is 8122415091.

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, 110353 + ... + 126443.

It is an arithmetic number, because the mean of its divisors is an integer number (136138320).

Almost surely, 2^1905142218 is an apocalyptic number.

1905142218 is an abundant number, since it is smaller than the sum of its proper divisors (2451284022).

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

1905142218 is a wasteful number, since it uses less digits than its factorization.

1905142218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18922.

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

The square root of 1905142218 is about 43647.9348652373. The cubic root of 1905142218 is about 1239.6786840890.

The spelling of 1905142218 in words is "one billion, nine hundred five million, one hundred forty-two thousand, two hundred eighteen".