18394545 has 16 divisors (see below), whose sum is σ = 31695552. Its totient is φ = 9055680.

The previous prime is 18394529. The next prime is 18394573. The reversal of 18394545 is 54549381.

It is not a de Polignac number, because 18394545 - 2⁴ = 18394529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

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, 46971 + ... + 47360.

It is an arithmetic number, because the mean of its divisors is an integer number (1980972).

Almost surely, 2^18394545 is an apocalyptic number.

18394545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18394545 is a deficient number, since it is larger than the sum of its proper divisors (13301007).

18394545 is a wasteful number, since it uses less digits than its factorization.

18394545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94352.

The product of its digits is 86400, while the sum is 39.

The square root of 18394545 is about 4288.8862190550. The cubic root of 18394545 is about 263.9751325291.

The spelling of 18394545 in words is "eighteen million, three hundred ninety-four thousand, five hundred forty-five".