18426935858 has 4 divisors (see below), whose sum is σ = 27640403790. Its totient is φ = 9213467928.

The previous prime is 18426935827. The next prime is 18426935893. The reversal of 18426935858 is 85853962481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85853962481 = 7 ⋅12264851783.

It can be written as a sum of positive squares in only one way, i.e., 17892540169 + 534395689 = 133763^2 + 23117^2 .

It is a super-2 number, since 2×18426935858² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18426935797 and 18426935806.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4606733963 + ... + 4606733966.

Almost surely, 2^18426935858 is an apocalyptic number.

18426935858 is a deficient number, since it is larger than the sum of its proper divisors (9213467932).

18426935858 is an equidigital number, since it uses as much as digits as its factorization.

18426935858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9213467931.

The product of its digits is 16588800, while the sum is 59.

The spelling of 18426935858 in words is "eighteen billion, four hundred twenty-six million, nine hundred thirty-five thousand, eight hundred fifty-eight".