18840475842643 has 32 divisors (see below), whose sum is σ = 23221393502720. Its totient is φ = 14885470828800.

The previous prime is 18840475842641. The next prime is 18840475842659. The reversal of 18840475842643 is 34624857404881.

It is not a de Polignac number, because 18840475842643 - 2¹ = 18840475842641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18840475842641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316632871 + ... + 316692367.

It is an arithmetic number, because the mean of its divisors is an integer number (725668546960).

Almost surely, 2^{18840475842643} is an apocalyptic number.

18840475842643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18840475842643 is a deficient number, since it is larger than the sum of its proper divisors (4380917660077).

18840475842643 is a wasteful number, since it uses less digits than its factorization.

18840475842643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64427.

The product of its (nonzero) digits is 165150720, while the sum is 64.

The spelling of 18840475842643 in words is "eighteen trillion, eight hundred forty billion, four hundred seventy-five million, eight hundred forty-two thousand, six hundred forty-three".