18914207 has 4 divisors (see below), whose sum is σ = 20369160. Its totient is φ = 17459256.

The previous prime is 18914201. The next prime is 18914213. The reversal of 18914207 is 70241981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70241981 = 79 ⋅889139.

It is an interprime number because it is at equal distance from previous prime (18914201) and next prime (18914213).

It is a cyclic number.

It is not a de Polignac number, because 18914207 - 2⁶ = 18914143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18914201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727457 + ... + 727482.

It is an arithmetic number, because the mean of its divisors is an integer number (5092290).

Almost surely, 2^18914207 is an apocalyptic number.

18914207 is a deficient number, since it is larger than the sum of its proper divisors (1454953).

18914207 is a wasteful number, since it uses less digits than its factorization.

18914207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454952.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 18914207 is about 4349.0466771466. The cubic root of 18914207 is about 266.4379269394.

The spelling of 18914207 in words is "eighteen million, nine hundred fourteen thousand, two hundred seven".