1918842650 has 24 divisors (see below), whose sum is σ = 3684180864. Its totient is φ = 742777200.

The previous prime is 1918842647. The next prime is 1918842671. The reversal of 1918842650 is 562488191.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617432 + ... + 620531.

It is an arithmetic number, because the mean of its divisors is an integer number (153507536).

Almost surely, 2^1918842650 is an apocalyptic number.

1918842650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1918842650 is a deficient number, since it is larger than the sum of its proper divisors (1765338214).

1918842650 is a wasteful number, since it uses less digits than its factorization.

1918842650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238006 (or 1238001 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 1918842650 is about 43804.5962200315. The cubic root of 1918842650 is about 1242.6432191625.

The spelling of 1918842650 in words is "one billion, nine hundred eighteen million, eight hundred forty-two thousand, six hundred fifty".