18854426149 has 8 divisors (see below), whose sum is σ = 20308379000. Its totient is φ = 17400989376.

The previous prime is 18854426093. The next prime is 18854426179. The reversal of 18854426149 is 94162445881.

It can be written as a sum of positive squares in 4 ways, for example, as 859545124 + 17994881025 = 29318^2 + 134145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18854426149 - 2²¹ = 18852328997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18854426096 and 18854426105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18854426179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51402 + ... + 200875.

It is an arithmetic number, because the mean of its divisors is an integer number (2538547375).

Almost surely, 2^18854426149 is an apocalyptic number.

It is an amenable number.

18854426149 is a deficient number, since it is larger than the sum of its proper divisors (1453952851).

18854426149 is a wasteful number, since it uses less digits than its factorization.

18854426149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258039.

The product of its digits is 2211840, while the sum is 52.

The spelling of 18854426149 in words is "eighteen billion, eight hundred fifty-four million, four hundred twenty-six thousand, one hundred forty-nine".