18940514 has 4 divisors (see below), whose sum is σ = 28410774. Its totient is φ = 9470256.

The previous prime is 18940513. The next prime is 18940541. The reversal of 18940514 is 41504981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41504981 = 7 ⋅5929283.

It can be written as a sum of positive squares in only one way, i.e., 13801225 + 5139289 = 3715^2 + 2267^2 .

It is not an unprimeable number, because it can be changed into a prime (18940513) 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 as a sum of consecutive naturals, namely, 4735127 + ... + 4735130.

Almost surely, 2^18940514 is an apocalyptic number.

18940514 is a deficient number, since it is larger than the sum of its proper divisors (9470260).

18940514 is an equidigital number, since it uses as much as digits as its factorization.

18940514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9470259.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18940514 is about 4352.0700821563. The cubic root of 18940514 is about 266.5613956008.

The spelling of 18940514 in words is "eighteen million, nine hundred forty thousand, five hundred fourteen".