18251247264 has 48 divisors (see below), whose sum is σ = 48157808832. Its totient is φ = 6052220928.

The previous prime is 18251247263. The next prime is 18251247281. The reversal of 18251247264 is 46274215281.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (18251247263) 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, 474004 + ... + 511059.

It is an arithmetic number, because the mean of its divisors is an integer number (1003287684).

Almost surely, 2^18251247264 is an apocalyptic number.

It is an amenable number.

18251247264 is an abundant number, since it is smaller than the sum of its proper divisors (29906561568).

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

18251247264 is a wasteful number, since it uses less digits than its factorization.

18251247264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985269 (or 985261 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The spelling of 18251247264 in words is "eighteen billion, two hundred fifty-one million, two hundred forty-seven thousand, two hundred sixty-four".