18526581040 has 60 divisors (see below), whose sum is σ = 47346157152. Its totient is φ = 6736935040.

The previous prime is 18526581001. The next prime is 18526581041. The reversal of 18526581040 is 4018562581.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 18526580984 and 18526581002.

It is not an unprimeable number, because it can be changed into a prime (18526581041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 947272 + ... + 966631.

Almost surely, 2^18526581040 is an apocalyptic number.

18526581040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18526581040 is an abundant number, since it is smaller than the sum of its proper divisors (28819576112).

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

18526581040 is a wasteful number, since it uses less digits than its factorization.

18526581040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913938 (or 1913921 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The spelling of 18526581040 in words is "eighteen billion, five hundred twenty-six million, five hundred eighty-one thousand, forty".