18864016263 has 8 divisors (see below), whose sum is σ = 27946690800. Its totient is φ = 12576010824.

The previous prime is 18864016231. The next prime is 18864016273. The reversal of 18864016263 is 36261046881.

18864016263 is a `hidden beast` number, since 18 + 8 + 6 + 4 + 0 + 1 + 626 + 3 = 666.

It is not a de Polignac number, because 18864016263 - 2⁵ = 18864016231 is a prime.

It is a super-2 number, since 2×18864016263² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18864016273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349333608 + ... + 349333661.

It is an arithmetic number, because the mean of its divisors is an integer number (3493336350).

Almost surely, 2^18864016263 is an apocalyptic number.

18864016263 is a deficient number, since it is larger than the sum of its proper divisors (9082674537).

18864016263 is an equidigital number, since it uses as much as digits as its factorization.

18864016263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698667278 (or 698667272 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 18864016263 in words is "eighteen billion, eight hundred sixty-four million, sixteen thousand, two hundred sixty-three".