1838668550 has 12 divisors (see below), whose sum is σ = 3419923596. Its totient is φ = 735467400.

The previous prime is 1838668543. The next prime is 1838668561. The reversal of 1838668550 is 558668381.

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 36773371 = 1838668550 / (1 + 8 + 3 + 8 + 6 + 6 + 8 + 5 + 5 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18386636 + ... + 18386735.

It is an arithmetic number, because the mean of its divisors is an integer number (284993633).

Almost surely, 2^1838668550 is an apocalyptic number.

1838668550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1838668550 is a deficient number, since it is larger than the sum of its proper divisors (1581255046).

1838668550 is a wasteful number, since it uses less digits than its factorization.

1838668550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36773383 (or 36773378 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 50.

The square root of 1838668550 is about 42879.6985763659. The cubic root of 1838668550 is about 1225.0894950581.

The spelling of 1838668550 in words is "one billion, eight hundred thirty-eight million, six hundred sixty-eight thousand, five hundred fifty".