18940260 has 24 divisors (see below), whose sum is σ = 53032896. Its totient is φ = 5050720.

The previous prime is 18940249. The next prime is 18940267. The reversal of 18940260 is 6204981.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (18940267) 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 7 ways as a sum of consecutive naturals, for example, 157776 + ... + 157895.

It is an arithmetic number, because the mean of its divisors is an integer number (2209704).

Almost surely, 2^18940260 is an apocalyptic number.

18940260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18940260 is an abundant number, since it is smaller than the sum of its proper divisors (34092636).

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

18940260 is a wasteful number, since it uses less digits than its factorization.

18940260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315683 (or 315681 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18940260 is about 4352.0409005431. The cubic root of 18940260 is about 266.5602040298.

The spelling of 18940260 in words is "eighteen million, nine hundred forty thousand, two hundred sixty".