18540615480 has 128 divisors (see below), whose sum is σ = 59892307200. Its totient is φ = 4574431232.

The previous prime is 18540615461. The next prime is 18540615493. The reversal of 18540615480 is 8451604581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43339 + ... + 197381.

It is an arithmetic number, because the mean of its divisors is an integer number (467908650).

Almost surely, 2^18540615480 is an apocalyptic number.

18540615480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18540615480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29946153600).

18540615480 is an abundant number, since it is smaller than the sum of its proper divisors (41351691720).

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

18540615480 is a wasteful number, since it uses less digits than its factorization.

18540615480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154133 (or 154129 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The spelling of 18540615480 in words is "eighteen billion, five hundred forty million, six hundred fifteen thousand, four hundred eighty".