18613655554 has 16 divisors (see below), whose sum is σ = 30225646080. Its totient is φ = 8545937040.

The previous prime is 18613655551. The next prime is 18613655611. The reversal of 18613655554 is 45555631681.

It is a happy number.

It is a super-4 number, since 4×18613655554⁴ (a number of 42 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18613655498 and 18613655507.

It is not an unprimeable number, because it can be changed into a prime (18613655551) 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, 1869144 + ... + 1879075.

It is an arithmetic number, because the mean of its divisors is an integer number (1889102880).

Almost surely, 2^18613655554 is an apocalyptic number.

18613655554 is a deficient number, since it is larger than the sum of its proper divisors (11611990526).

18613655554 is a wasteful number, since it uses less digits than its factorization.

18613655554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748425.

The product of its digits is 2160000, while the sum is 49.

The spelling of 18613655554 in words is "eighteen billion, six hundred thirteen million, six hundred fifty-five thousand, five hundred fifty-four".