18940485 has 16 divisors (see below), whose sum is σ = 31124736. Its totient is φ = 9828288.

The previous prime is 18940469. The next prime is 18940489. The reversal of 18940485 is 58404981.

It is not a de Polignac number, because 18940485 - 2⁴ = 18940469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18940489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16509 + ... + 17618.

It is an arithmetic number, because the mean of its divisors is an integer number (1945296).

Almost surely, 2^18940485 is an apocalyptic number.

18940485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18940485 is a deficient number, since it is larger than the sum of its proper divisors (12184251).

18940485 is a wasteful number, since it uses less digits than its factorization.

18940485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34172.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 18940485 is about 4352.0667504072. The cubic root of 18940485 is about 266.5612595558.

The spelling of 18940485 in words is "eighteen million, nine hundred forty thousand, four hundred eighty-five".