18300697728 has 64 divisors (see below), whose sum is σ = 50179365120. Its totient is φ = 5903447040.

The previous prime is 18300697673. The next prime is 18300697729. The reversal of 18300697728 is 82779600381.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (18300697729) 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, 756775 + ... + 780582.

It is an arithmetic number, because the mean of its divisors is an integer number (784052580).

Almost surely, 2^18300697728 is an apocalyptic number.

It is an amenable number.

18300697728 is an abundant number, since it is smaller than the sum of its proper divisors (31878667392).

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

18300697728 is a wasteful number, since it uses less digits than its factorization.

18300697728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537405 (or 1537393 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 18300697728 in words is "eighteen billion, three hundred million, six hundred ninety-seven thousand, seven hundred twenty-eight".