18922127648 has 18 divisors (see below), whose sum is σ = 37254470841. Its totient is φ = 9460674752.

The previous prime is 18922127647. The next prime is 18922127663. The reversal of 18922127648 is 84672122981.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 18271469584 + 650658064 = 135172^2 + 25508^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=97268.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18922127596 and 18922127605.

It is not an unprimeable number, because it can be changed into a prime (18922127647) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 765986 + ... + 790302.

Almost surely, 2^18922127648 is an apocalyptic number.

It is an amenable number.

18922127648 is a deficient number, since it is larger than the sum of its proper divisors (18332343193).

18922127648 is an frugal number, since it uses more digits than its factorization.

18922127648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48644 (or 24319 counting only the distinct ones).

The product of its digits is 774144, while the sum is 50.

Multiplying 18922127648 by its sum of digits (50), we get a square (946106382400 = 972680²).

The spelling of 18922127648 in words is "eighteen billion, nine hundred twenty-two million, one hundred twenty-seven thousand, six hundred forty-eight".