18280276550 has 24 divisors (see below), whose sum is σ = 34191282600. Its totient is φ = 7271257280.

The previous prime is 18280276541. The next prime is 18280276591. The reversal of 18280276550 is 5567208281.

It is a congruent number.

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, 1012295 + ... + 1030194.

It is an arithmetic number, because the mean of its divisors is an integer number (1424636775).

Almost surely, 2^18280276550 is an apocalyptic number.

18280276550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18280276550 is a deficient number, since it is larger than the sum of its proper divisors (15911006050).

18280276550 is a wasteful number, since it uses less digits than its factorization.

18280276550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042680 (or 2042675 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 18280276550 in words is "eighteen billion, two hundred eighty million, two hundred seventy-six thousand, five hundred fifty".