18868413505 has 16 divisors (see below), whose sum is σ = 23840323200. Its totient is φ = 14296348800.

The previous prime is 18868413461. The next prime is 18868413541. The reversal of 18868413505 is 50531486881.

It is not a de Polignac number, because 18868413505 - 2⁹ = 18868412993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347980 + ... + 398530.

It is an arithmetic number, because the mean of its divisors is an integer number (1490020200).

Almost surely, 2^18868413505 is an apocalyptic number.

It is an amenable number.

18868413505 is a deficient number, since it is larger than the sum of its proper divisors (4971909695).

18868413505 is a wasteful number, since it uses less digits than its factorization.

18868413505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54504.

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 18868413505 in words is "eighteen billion, eight hundred sixty-eight million, four hundred thirteen thousand, five hundred five".