18397746 has 32 divisors (see below), whose sum is σ = 42664320. Its totient is φ = 5865552.

The previous prime is 18397721. The next prime is 18397747. The reversal of 18397746 is 64779381.

It is not an unprimeable number, because it can be changed into a prime (18397747) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6165 + ... + 8648.

It is an arithmetic number, because the mean of its divisors is an integer number (1333260).

Almost surely, 2^18397746 is an apocalyptic number.

18397746 is an abundant number, since it is smaller than the sum of its proper divisors (24266574).

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

18397746 is a wasteful number, since it uses less digits than its factorization.

18397746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14847 (or 14841 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 18397746 is about 4289.2593766290. The cubic root of 18397746 is about 263.9904438690.

The spelling of 18397746 in words is "eighteen million, three hundred ninety-seven thousand, seven hundred forty-six".