18540761320 has 16 divisors (see below), whose sum is σ = 41716713060. Its totient is φ = 7416304512.

The previous prime is 18540761227. The next prime is 18540761321. The reversal of 18540761320 is 2316704581.

It can be written as a sum of positive squares in 2 ways, for example, as 18467179236 + 73582084 = 135894^2 + 8578^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18540761320.

It is not an unprimeable number, because it can be changed into a prime (18540761321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231759477 + ... + 231759556.

Almost surely, 2^18540761320 is an apocalyptic number.

18540761320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18540761320 is an abundant number, since it is smaller than the sum of its proper divisors (23175951740).

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

18540761320 is a wasteful number, since it uses less digits than its factorization.

18540761320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463519044 (or 463519040 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 18540761320 in words is "eighteen billion, five hundred forty million, seven hundred sixty-one thousand, three hundred twenty".