18933580053540 has 72 divisors (see below), whose sum is σ = 57439348614648. Its totient is φ = 5048296296960.

The previous prime is 18933580053539. The next prime is 18933580053547. The reversal of 18933580053540 is 4535008533981.

18933580053540 is a `hidden beast` number, since 1 + 8 + 9 + 3 + 3 + 580 + 0 + 5 + 3 + 54 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3502070589924 + 15431509463616 = 1871382^2 + 3928296^2 .

It is not an unprimeable number, because it can be changed into a prime (18933580053547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5473191 + ... + 8235470.

It is an arithmetic number, because the mean of its divisors is an integer number (797768730759).

Almost surely, 2^{18933580053540} is an apocalyptic number.

18933580053540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18933580053540 is an abundant number, since it is smaller than the sum of its proper divisors (38505768561108).

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

18933580053540 is a wasteful number, since it uses less digits than its factorization.

18933580053540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13716349 (or 13716344 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The spelling of 18933580053540 in words is "eighteen trillion, nine hundred thirty-three billion, five hundred eighty million, fifty-three thousand, five hundred forty".