18928206441 has 10 divisors (see below), whose sum is σ = 28275469002. Its totient is φ = 12618804240.

The previous prime is 18928206403. The next prime is 18928206443. The reversal of 18928206441 is 14460282981.

18928206441 is a `hidden beast` number, since 189 + 2 + 8 + 20 + 6 + 441 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16665777216 + 2262429225 = 129096^2 + 47565^2 .

It is not a de Polignac number, because 18928206441 - 2⁶ = 18928206377 is a prime.

It is a super-2 number, since 2×18928206441² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18928206443) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 116840700 + ... + 116840861.

Almost surely, 2^18928206441 is an apocalyptic number.

It is an amenable number.

18928206441 is a deficient number, since it is larger than the sum of its proper divisors (9347262561).

18928206441 is an equidigital number, since it uses as much as digits as its factorization.

18928206441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233681573 (or 233681564 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 18928206441 in words is "eighteen billion, nine hundred twenty-eight million, two hundred six thousand, four hundred forty-one".