18500030653 has 12 divisors (see below), whose sum is σ = 20498459520. Its totient is φ = 16679806416.

The previous prime is 18500030629. The next prime is 18500030663. The reversal of 18500030653 is 35603000581.

It is not a de Polignac number, because 18500030653 - 2⁹ = 18500030141 is a prime.

It is a super-2 number, since 2×18500030653² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18500030663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1265613 + ... + 1280146.

It is an arithmetic number, because the mean of its divisors is an integer number (1708204960).

Almost surely, 2^18500030653 is an apocalyptic number.

18500030653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18500030653 is a deficient number, since it is larger than the sum of its proper divisors (1998428867).

18500030653 is a wasteful number, since it uses less digits than its factorization.

18500030653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545828 (or 2545815 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 18500030653 in words is "eighteen billion, five hundred million, thirty thousand, six hundred fifty-three".