18814729464 has 128 divisors (see below), whose sum is σ = 56624832000. Its totient is φ = 5765340672.

The previous prime is 18814729441. The next prime is 18814729489. The reversal of 18814729464 is 46492741881.

18814729464 is a `hidden beast` number, since 1 + 8 + 81 + 472 + 94 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 18814729464.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98317 + ... + 217475.

It is an arithmetic number, because the mean of its divisors is an integer number (442381500).

Almost surely, 2^18814729464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18814729464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28312416000).

18814729464 is an abundant number, since it is smaller than the sum of its proper divisors (37810102536).

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

18814729464 is a wasteful number, since it uses less digits than its factorization.

18814729464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119234 (or 119224 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 18814729464 in words is "eighteen billion, eight hundred fourteen million, seven hundred twenty-nine thousand, four hundred sixty-four".