18743801 has 2 divisors, whose sum is σ = 18743802. Its totient is φ = 18743800.

The previous prime is 18743789. The next prime is 18743839. The reversal of 18743801 is 10834781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12418576 + 6325225 = 3524^2 + 2515^2 .

It is an emirp because it is prime and its reverse (10834781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18743801 - 2⁶ = 18743737 is a prime.

It is not a weakly prime, because it can be changed into another prime (18743891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9371900 + 9371901.

It is an arithmetic number, because the mean of its divisors is an integer number (9371901).

Almost surely, 2^18743801 is an apocalyptic number.

It is an amenable number.

18743801 is a deficient number, since it is larger than the sum of its proper divisors (1).

18743801 is an equidigital number, since it uses as much as digits as its factorization.

18743801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 18743801 is about 4329.4111608855. The cubic root of 18743801 is about 265.6353616442.

The spelling of 18743801 in words is "eighteen million, seven hundred forty-three thousand, eight hundred one".