1868921366 has 16 divisors (see below), whose sum is σ = 3116416128. Its totient is φ = 834753600.

The previous prime is 1868921359. The next prime is 1868921423. The reversal of 1868921366 is 6631298681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1158575 + ... + 1160186.

It is an arithmetic number, because the mean of its divisors is an integer number (194776008).

Almost surely, 2^1868921366 is an apocalyptic number.

1868921366 is a deficient number, since it is larger than the sum of its proper divisors (1247494762).

1868921366 is a wasteful number, since it uses less digits than its factorization.

1868921366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318807.

The product of its digits is 746496, while the sum is 50.

The square root of 1868921366 is about 43231.0231893718. The cubic root of 1868921366 is about 1231.7720433885.

The spelling of 1868921366 in words is "one billion, eight hundred sixty-eight million, nine hundred twenty-one thousand, three hundred sixty-six".