18857292643 has 24 divisors (see below), whose sum is σ = 22343760144. Its totient is φ = 15864710400.

The previous prime is 18857292631. The next prime is 18857292689. The reversal of 18857292643 is 34629275881.

It is not a de Polignac number, because 18857292643 - 2¹³ = 18857284451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18852292643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 912303 + ... + 932743.

It is an arithmetic number, because the mean of its divisors is an integer number (930990006).

Almost surely, 2^18857292643 is an apocalyptic number.

18857292643 is a deficient number, since it is larger than the sum of its proper divisors (3486467501).

18857292643 is a wasteful number, since it uses less digits than its factorization.

18857292643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20803 (or 20796 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The spelling of 18857292643 in words is "eighteen billion, eight hundred fifty-seven million, two hundred ninety-two thousand, six hundred forty-three".