18989249264 has 80 divisors (see below), whose sum is σ = 38161173600. Its totient is φ = 9148059648.

The previous prime is 18989249219. The next prime is 18989249267. The reversal of 18989249264 is 46294298981.

It is a super-2 number, since 2×18989249264² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18989249197 and 18989249206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18989249267) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23472092 + ... + 23472900.

It is an arithmetic number, because the mean of its divisors is an integer number (477014670).

Almost surely, 2^18989249264 is an apocalyptic number.

It is an amenable number.

18989249264 is an abundant number, since it is smaller than the sum of its proper divisors (19171924336).

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

18989249264 is a wasteful number, since it uses less digits than its factorization.

18989249264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282 (or 1276 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 62.

The spelling of 18989249264 in words is "eighteen billion, nine hundred eighty-nine million, two hundred forty-nine thousand, two hundred sixty-four".