18645657270 has 64 divisors (see below), whose sum is σ = 44970024960. Its totient is φ = 4947740928.

The previous prime is 18645657157. The next prime is 18645657323. The reversal of 18645657270 is 7275654681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6937867 + ... + 6940553.

It is an arithmetic number, because the mean of its divisors is an integer number (702656640).

Almost surely, 2^18645657270 is an apocalyptic number.

18645657270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18645657270 is an abundant number, since it is smaller than the sum of its proper divisors (26324367690).

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

18645657270 is a wasteful number, since it uses less digits than its factorization.

18645657270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3749.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 18645657270 in words is "eighteen billion, six hundred forty-five million, six hundred fifty-seven thousand, two hundred seventy".