18469274862840 has 128 divisors (see below), whose sum is σ = 55619532057600. Its totient is φ = 4906325312000.

The previous prime is 18469274862839. The next prime is 18469274862869. The reversal of 18469274862840 is 4826847296481.

It is a super-2 number, since 2×18469274862840² (a number of 27 digits) contains 22 as substring.

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, 395438929 + ... + 395485631.

It is an arithmetic number, because the mean of its divisors is an integer number (434527594200).

Almost surely, 2^{18469274862840} is an apocalyptic number.

18469274862840 is a gapful number since it is divisible by the number (10) 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 18469274862840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27809766028800).

18469274862840 is an abundant number, since it is smaller than the sum of its proper divisors (37150257194760).

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

18469274862840 is a wasteful number, since it uses less digits than its factorization.

18469274862840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59237 (or 59233 counting only the distinct ones).

The product of its (nonzero) digits is 297271296, while the sum is 69.

The spelling of 18469274862840 in words is "eighteen trillion, four hundred sixty-nine billion, two hundred seventy-four million, eight hundred sixty-two thousand, eight hundred forty".