18917414206 has 4 divisors (see below), whose sum is σ = 28376121312. Its totient is φ = 9458707102.

The previous prime is 18917414203. The next prime is 18917414213. The reversal of 18917414206 is 60241471981.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×18917414206² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18917414203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4729353550 + ... + 4729353553.

It is an arithmetic number, because the mean of its divisors is an integer number (7094030328).

Almost surely, 2^18917414206 is an apocalyptic number.

18917414206 is a deficient number, since it is larger than the sum of its proper divisors (9458707106).

18917414206 is an equidigital number, since it uses as much as digits as its factorization.

18917414206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9458707105.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 18917414206 in words is "eighteen billion, nine hundred seventeen million, four hundred fourteen thousand, two hundred six".