18351666654 has 32 divisors (see below), whose sum is σ = 36940536864. Its totient is φ = 6077736960.

The previous prime is 18351666653. The next prime is 18351666661. The reversal of 18351666654 is 45666615381.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18351666597 and 18351666606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18351666653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1781262 + ... + 1791534.

It is an arithmetic number, because the mean of its divisors is an integer number (1154391777).

Almost surely, 2^18351666654 is an apocalyptic number.

18351666654 is an abundant number, since it is smaller than the sum of its proper divisors (18588870210).

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

18351666654 is a wasteful number, since it uses less digits than its factorization.

18351666654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12172.

The product of its digits is 3110400, while the sum is 51.

The spelling of 18351666654 in words is "eighteen billion, three hundred fifty-one million, six hundred sixty-six thousand, six hundred fifty-four".