18142776 has 24 divisors (see below), whose sum is σ = 49136880. Its totient is φ = 6047568.

The previous prime is 18142769. The next prime is 18142793. The reversal of 18142776 is 67724181.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18142776.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125920 + ... + 126063.

It is an arithmetic number, because the mean of its divisors is an integer number (2047370).

Almost surely, 2^18142776 is an apocalyptic number.

It is an amenable number.

18142776 is an abundant number, since it is smaller than the sum of its proper divisors (30994104).

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

18142776 is a wasteful number, since it uses less digits than its factorization.

18142776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251995 (or 251988 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 18142776 is about 4259.4337651852. The cubic root of 18142776 is about 262.7652393854.

It can be divided in two parts, 181427 and 76, that added together give a triangular number (181503 = T₆₀₂).

The spelling of 18142776 in words is "eighteen million, one hundred forty-two thousand, seven hundred seventy-six".