18440773 has 12 divisors (see below), whose sum is σ = 21023040. Its totient is φ = 16123536.

The previous prime is 18440743. The next prime is 18440791. The reversal of 18440773 is 37704481.

It is not a de Polignac number, because 18440773 - 2¹³ = 18432581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18440743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340 + ... + 6082.

It is an arithmetic number, because the mean of its divisors is an integer number (1751920).

Almost surely, 2^18440773 is an apocalyptic number.

18440773 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18440773 is a deficient number, since it is larger than the sum of its proper divisors (2582267).

18440773 is a wasteful number, since it uses less digits than its factorization.

18440773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5788 (or 5775 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 18440773 is about 4294.2721152717. The cubic root of 18440773 is about 264.1960827083.

The spelling of 18440773 in words is "eighteen million, four hundred forty thousand, seven hundred seventy-three".