18469213056 has 192 divisors, whose sum is σ = 62989879680. Its totient is φ = 5276855808.

The previous prime is 18469213039. The next prime is 18469213057. The reversal of 18469213056 is 65031296481.

18469213056 is a `hidden beast` number, since 1 + 8 + 469 + 2 + 130 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×18469213056² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18469213057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175315 + ... + 260141.

It is an arithmetic number, because the mean of its divisors is an integer number (328072290).

Almost surely, 2^18469213056 is an apocalyptic number.

18469213056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18469213056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31494939840).

18469213056 is an abundant number, since it is smaller than the sum of its proper divisors (44520666624).

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

18469213056 is an frugal number, since it uses more digits than its factorization.

18469213056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84863 (or 84839 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 18469213056 in words is "eighteen billion, four hundred sixty-nine million, two hundred thirteen thousand, fifty-six".