18383946 has 32 divisors (see below), whose sum is σ = 43849728. Its totient is φ = 5023920.

The previous prime is 18383927. The next prime is 18383971. The reversal of 18383946 is 64938381.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 18383898 and 18383907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8550 + ... + 10481.

It is an arithmetic number, because the mean of its divisors is an integer number (1370304).

Almost surely, 2^18383946 is an apocalyptic number.

18383946 is an abundant number, since it is smaller than the sum of its proper divisors (25465782).

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

18383946 is a wasteful number, since it uses less digits than its factorization.

18383946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19066.

The product of its digits is 124416, while the sum is 42.

The square root of 18383946 is about 4287.6504055252. The cubic root of 18383946 is about 263.9244216620.

The spelling of 18383946 in words is "eighteen million, three hundred eighty-three thousand, nine hundred forty-six".