18825452818 has 16 divisors (see below), whose sum is σ = 28346742360. Its totient is φ = 9376603776.

The previous prime is 18825452797. The next prime is 18825452831. The reversal of 18825452818 is 81825452881.

It can be written as a sum of positive squares in 4 ways, for example, as 18500624289 + 324828529 = 136017^2 + 18023^2 .

It is a super-2 number, since 2×18825452818² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583896 + ... + 615292.

Almost surely, 2^18825452818 is an apocalyptic number.

18825452818 is a deficient number, since it is larger than the sum of its proper divisors (9521289542).

18825452818 is a wasteful number, since it uses less digits than its factorization.

18825452818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32541.

The product of its digits is 1638400, while the sum is 52.

The spelling of 18825452818 in words is "eighteen billion, eight hundred twenty-five million, four hundred fifty-two thousand, eight hundred eighteen".