18447475247870 has 32 divisors (see below), whose sum is σ = 33252935767200. Its totient is φ = 7368441042816.

The previous prime is 18447475247849. The next prime is 18447475247893. The reversal of 18447475247870 is 7874257474481.

It is a self number, because there is not a number n which added to its sum of digits gives 18447475247870.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72082496 + ... + 72337964.

It is an arithmetic number, because the mean of its divisors is an integer number (1039154242725).

Almost surely, 2^{18447475247870} is an apocalyptic number.

18447475247870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18447475247870 is a deficient number, since it is larger than the sum of its proper divisors (14805460519330).

18447475247870 is a wasteful number, since it uses less digits than its factorization.

18447475247870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265772.

The product of its (nonzero) digits is 393379840, while the sum is 68.

The spelling of 18447475247870 in words is "eighteen trillion, four hundred forty-seven billion, four hundred seventy-five million, two hundred forty-seven thousand, eight hundred seventy".