18551460040 has 32 divisors (see below), whose sum is σ = 41774859000. Its totient is φ = 7414526464.

The previous prime is 18551460013. The next prime is 18551460041. The reversal of 18551460040 is 4006415581.

It can be written as a sum of positive squares in 4 ways, for example, as 17822784004 + 728676036 = 133502^2 + 26994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18551459978 and 18551460005.

It is not an unprimeable number, because it can be changed into a prime (18551460041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139525 + ... + 237844.

Almost surely, 2^18551460040 is an apocalyptic number.

18551460040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18551460040 is an abundant number, since it is smaller than the sum of its proper divisors (23223398960).

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

18551460040 is a wasteful number, since it uses less digits than its factorization.

18551460040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378609 (or 378605 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 18551460040 in words is "eighteen billion, five hundred fifty-one million, four hundred sixty thousand, forty".