18534913634 has 8 divisors (see below), whose sum is σ = 28217331408. Its totient is φ = 9129136500.

The previous prime is 18534913633. The next prime is 18534913643. The reversal of 18534913634 is 43631943581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18534913633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69159992 + ... + 69160259.

It is an arithmetic number, because the mean of its divisors is an integer number (3527166426).

Almost surely, 2^18534913634 is an apocalyptic number.

18534913634 is a deficient number, since it is larger than the sum of its proper divisors (9682417774).

18534913634 is a wasteful number, since it uses less digits than its factorization.

18534913634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138320320.

The product of its digits is 933120, while the sum is 47.

The spelling of 18534913634 in words is "eighteen billion, five hundred thirty-four million, nine hundred thirteen thousand, six hundred thirty-four".