18854513843919 has 16 divisors (see below), whose sum is σ = 27075028839264. Its totient is φ = 11601971712000.

The previous prime is 18854513843849. The next prime is 18854513843959. The reversal of 18854513843919 is 91934831545881.

It is not a de Polignac number, because 18854513843919 - 2²⁴ = 18854497066703 is a prime.

It is a super-2 number, since 2×18854513843919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18854513843959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16223622 + ... + 17346899.

It is an arithmetic number, because the mean of its divisors is an integer number (1692189302454).

Almost surely, 2^{18854513843919} is an apocalyptic number.

18854513843919 is a deficient number, since it is larger than the sum of its proper divisors (8220514995345).

18854513843919 is a wasteful number, since it uses less digits than its factorization.

18854513843919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33584938.

The product of its digits is 149299200, while the sum is 69.

The spelling of 18854513843919 in words is "eighteen trillion, eight hundred fifty-four billion, five hundred thirteen million, eight hundred forty-three thousand, nine hundred nineteen".