18628664022 has 96 divisors (see below), whose sum is σ = 45800344512. Its totient is φ = 5439025152.

The previous prime is 18628664017. The next prime is 18628664069. The reversal of 18628664022 is 22046682681.

18628664022 is a `hidden beast` number, since 18 + 628 + 6 + 6 + 4 + 0 + 2 + 2 = 666.

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 47 ways as a sum of consecutive naturals, for example, 224638 + ... + 296174.

It is an arithmetic number, because the mean of its divisors is an integer number (477086922).

Almost surely, 2^18628664022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18628664022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22900172256).

18628664022 is an abundant number, since it is smaller than the sum of its proper divisors (27171680490).

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

18628664022 is a wasteful number, since it uses less digits than its factorization.

18628664022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71622 (or 71619 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 18628664022 in words is "eighteen billion, six hundred twenty-eight million, six hundred sixty-four thousand, twenty-two".