18226047840 has 576 divisors, whose sum is σ = 78475703040. Its totient is φ = 3495260160.

The previous prime is 18226047839. The next prime is 18226047859. The reversal of 18226047840 is 4874062281.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 18226047792 and 18226047801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3360651 + ... + 3366069.

It is an arithmetic number, because the mean of its divisors is an integer number (136242540).

Almost surely, 2^18226047840 is an apocalyptic number.

18226047840 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 18226047840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39237851520).

18226047840 is an abundant number, since it is smaller than the sum of its proper divisors (60249655200).

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

18226047840 is a wasteful number, since it uses less digits than its factorization.

18226047840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475 (or 5460 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The spelling of 18226047840 in words is "eighteen billion, two hundred twenty-six million, forty-seven thousand, eight hundred forty".