18203427864 has 64 divisors (see below), whose sum is σ = 51174345600. Its totient is φ = 5994697248.

The previous prime is 18203427857. The next prime is 18203427871. The reversal of 18203427864 is 46872430281.

It is a happy number.

18203427864 is a `hidden beast` number, since 18 + 203 + 427 + 8 + 6 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (18203427857) and next prime (18203427871).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 489754 + ... + 525609.

It is an arithmetic number, because the mean of its divisors is an integer number (799599150).

Almost surely, 2^18203427864 is an apocalyptic number.

It is an amenable number.

18203427864 is an abundant number, since it is smaller than the sum of its proper divisors (32970917736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18203427864 is a wasteful number, since it uses less digits than its factorization.

18203427864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015461 (or 1015451 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 18203427864 in words is "eighteen billion, two hundred three million, four hundred twenty-seven thousand, eight hundred sixty-four".